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Top things to do in Hanoi

Ninh Binh Day Tour from Ha Noi
Klook's choice
Tours • From Hanoi

Ninh Binh Day Tour from Ha Noi

Book now for tomorrow
English guided
Free cancellation
4.8 / 5
(3.3K) • 50K+ booked
US$ 33.65
Sale 15% off
Thang Long Water Puppet Show Ticket in Hanoi
Events & shows • Hanoi

Thang Long Water Puppet Show Ticket in Hanoi

Free cancellation
Instant confirmation
4.5 / 5
(3.5K) • 100K+ booked
US$ 5.09
Retail: US$ 6.59
Lotus Water Puppet Show Ticket in Hanoi
Events & shows • Hanoi

Lotus Water Puppet Show Ticket in Hanoi

Book now for tomorrow
Free cancellation
Instant confirmation
4.5 / 5
(1.0K) • 40K+ booked
From
US$ 3.89
Cozy Bay Day Cruise: Ha Long Bay, Sung Sot, Ti Top
Cruises • From Hanoi, Ha Long

Cozy Bay Day Cruise: Ha Long Bay, Sung Sot, Ti Top

Book now for tomorrow
Hotel pick-up
English guided
4.9 / 5
(6.7K) • 90K+ booked
From
US$ 32.70
Sale 38% off
Hanoi Sightseeing Double-Decker Bus Ticket by City Sightseeing
Fall deal
Tours • Hanoi

Hanoi Sightseeing Double-Decker Bus Ticket by City Sightseeing

Book now for tomorrow
Free cancellation
Instant confirmation
4.3 / 5
(2.7K) • 80K+ booked
US$ 5.09
Sale 16% off
Hanoi Spa: Premium Massage & Holistic Wellness Experience
Massages • Hanoi

Hanoi Spa: Premium Massage & Holistic Wellness Experience

In-app reservation
Free cancellation
Instant confirmation
5.0 / 5
(6.1K) • 7K+ booked
US$ 3.90
Sale 80% off
Ha Noi Hop On Hop Off Pass
Tours • Hanoi

Ha Noi Hop On Hop Off Pass

Book now for tomorrow
Instant confirmation
4.3 / 5
(1.4K) • 50K+ booked
US$ 5.50
Sale 5% off
Best of Ninh Binh Day Tour: Hoa Lu, Trang An, Tam Coc, Hang Mua
Tours • From Hanoi

Best of Ninh Binh Day Tour: Hoa Lu, Trang An, Tam Coc, Hang Mua

Book now for tomorrow
Private tour
English guided
4.8 / 5
(3.9K) • 100K+ booked
US$ 39.35
Sale 20% off
Diamond Era Luxury Day Cruise: Ha Long Bay, Sung Sot, Ti Top
Cruises • From Hanoi, Ha Long

Diamond Era Luxury Day Cruise: Ha Long Bay, Sung Sot, Ti Top

Hotel pick-up
English guided
Free cancellation
4.9 / 5
(5.8K) • 40K+ booked
US$ 38.60
Jewels of the Bay Day Cruise: Ha Long Bay with Sung Sot & Ti Top
Klook's choice
Cruises • From Hanoi, Ha Long

Jewels of the Bay Day Cruise: Ha Long Bay with Sung Sot & Ti Top

Book now for tomorrow
English guided
Free cancellation
4.9 / 5
(2.3K) • 20K+ booked
From
US$ 38.89
Sale 35% off
Lotte World Aquarium Hanoi Ticket
Zoos & aquariums • Hanoi

Lotte World Aquarium Hanoi Ticket

Instant confirmation
4.5 / 5
(735) • 100K+ booked
US$ 7.35
Sale 15% off
Combo 8% off
Ninh Binh Day Tour From Hanoi: Hoa Lu, Trang An & Mua Cave
Klook's choice
Tours • From Hanoi

Ninh Binh Day Tour From Hanoi: Hoa Lu, Trang An & Mua Cave

Book now for tomorrow
English guided
Free cancellation
5.0 / 5
(632) • 3K+ booked
From
US$ 42.09
Sale 15% off

Top attractions in Hanoi

Commercial district
4.9/5(74K+ reviews)

Hanoi Train Street

Experience the thrill of watching a train pass by mere inches away on the famous Hanoi Train Street in Vietnam. This unique destination offers a once-in-a-lifetime experience that should be at the top of your travel bucket list. Get ready to immerse yourself in the rich history and vibrant culture of this iconic location. Despite closures and restrictions in 2024, visiting this iconic sight is still possible and worth it! Hanoi Train Street is a unique and iconic tourist attraction where trains pass by just feet away from open-air cafes, creating an exhilarating experience for visitors.
Tourist attraction
4.9/5(60K+ reviews)

Hanoi Old Quarter

Immerse yourself in the vibrant history and culture of Hanoi Old Quarter, a downtown area known for its rich heritage, bustling streets, and traditional charm. Explore the unique architecture, historical sites, and culinary delights that make this area a must-visit destination for tourists.
Museum
4.9/5(63K+ reviews)

Hoa Lo Prison Museum

Immerse yourself in the rich history and culture of Hanoi by visiting the Hoa Lo Prison Museum. This unique destination offers a glimpse into Vietnam's colonial past, showcasing the contrasting lives of prisoners during different eras. Explore the haunting history of Hỏa Lò Prison Museum in Hanoi, a site with a unique appeal that draws visitors in to uncover its dark past and cultural significance. Immerse yourself in the dark history and cultural significance of Hoa Lo Prison Museum in Hanoi, Vietnam. This historical relic offers a unique insight into the lives of Vietnamese revolutionaries during the First Indochina War, making it a must-visit destination for history enthusiasts and travelers seeking a deeper understanding of Vietnam's past.
Religious spot
4.9/5(54K+ reviews)

Temple of Literature

Immerse yourself in the grandeur and history of Hanoi by visiting the Temple of Literature, a hidden gem in the bustling city center. Discover the first national university in Vietnam, founded almost 1000 years ago, and delve into the rich cultural tapestry of this ancient capital.
Scenic spot
4.9/5(57K+ reviews)

Hanoi Opera House

Immerse yourself in the cultural and historical charm of Hanoi at the iconic Hanoi Opera House. This architectural masterpiece, reminiscent of the Palais Garnier in Paris, stands as a testament to Vietnam's rich heritage and artistic legacy. Explore the grandeur and elegance of this neoclassical opera house that has witnessed significant historical events and cultural performances over the years. Located in the heart of the city, the Hanoi Opera House continues to host significant events and showcases the rich cultural heritage of Vietnam, making it a must-visit destination for travelers seeking a glimpse into the country's history and arts.
Natural landmark
4.9/5(65K+ reviews)

Hoan Kiem Lake

Immerse yourself in the essence of ancient Hanoi at Hoan Kiem Lake, a symbol of the city's gentle charm. Explore the unique features of Vietnamese architecture, cuisine, and lifestyle while discovering the rich culture of Hanoi. Immerse yourself in the legendary charm of Hoan Kiem Lake, the focal point of cultural and social activities in Hanoi for centuries. Discover the rich history and cultural significance of this iconic destination surrounded by historical landmarks and scenic beauty. Immerse yourself in the peaceful beauty and rich cultural history of Hoan Kiem Lake Hanoi, located in the heart of the capital of Vietnam. This picturesque destination is renowned for its unique charm and attracts both locals and tourists alike with its magnificent allure.
Religious spot
4.9/5(73K+ reviews)

Saint Joseph Cathedral

St. Joseph's Cathedral, also known as Nhà thờ Chính tòa Thánh Giuse, is a captivating Catholic church located in the heart of Hanoi, Vietnam. This late 19th-century Gothic Revival church stands as a symbol of faith and architectural beauty, drawing visitors from around the world. Immerse yourself in the rich history and architectural beauty of St. Joseph's Cathedral in Hanoi. This iconic landmark, built during the French colonial period, stands as a testament to the enduring spirit of the city. Explore the Gothic-style architecture and vibrant cultural scene surrounding this historical site. Immerse yourself in the rich history and cultural significance of St. Joseph's Cathedral in Hanoi. This iconic landmark stands as a testament to the city's architectural beauty and religious heritage, drawing visitors from around the world.
Theater
4.9/5(61K+ reviews)

Thang Long Water Puppet Theatre

Immerse yourself in the enchanting world of Vietnamese tradition at the Thang Long Water Puppet Theatre in Hanoi. Experience the magic of water puppetry, a unique art form dating back to the 11th century, that will captivate and delight audiences of all ages. Discover the cultural significance and historical roots of Vietnamese puppetry in a mesmerizing performance that combines music, storytelling, and craftsmanship. This iconic theater has been enchanting visitors with its world-famous water puppet shows, making it a must-visit destination for travelers seeking a unique cultural experience.
Natural landmark
4.9/5(57K+ reviews)

West Lake

Discover the enchanting beauty of West Lake Hanoi, the largest natural lake in the city. While travelers may see it as a picturesque view, for locals, it holds a special place for socializing, finding peace, and staying active. A leisurely stroll around the lake offers a serene escape from the bustling city life, providing a glimpse into the authentic local lifestyle of the Hanoians.
Historical site
4.9/5(54K+ reviews)

Ho Chi Minh Mausoleum

Ho Chi Minh Mausoleum is one of Hanoi’s most important landmarks and a meaningful site for many visitors. Located in Ba Dinh Square, it's the final resting place of President Ho Chi Minh, also lovingly called Uncle Ho by the local people. Inside the building, you can view Ho Chi Minh's body, which lies in a glass case, carefully preserved in the style used by the Soviet Union. A military honor guard stands by, symbolizing the deep respect for this revolutionary leader who led Vietnam to independence and formed the Democratic Republic. As part of the Ho Chi Minh Complex, your visit can also include the Ho Chi Minh Museum, the Presidential Palace, and the nearby One Pillar Pagoda, a small temple with a unique sloping roof inspired by a lotus blossom. These stops give deeper insights into Ho Chi Minh’s life, Vietnamese history, and modern Vietnam. Visit the Ho Chi Minh Mausoleum to honor Uncle Ho and experience the legacy that shaped modern Vietnam. Don’t miss this essential stop on your journey through Vietnam’s culture and past.
Tourist attraction
4.9/5(58K+ reviews)

Thang Long Citadel

Immerse yourself in the rich history and cultural significance of the Imperial Citadel of Thăng Long in Hanoi, Vietnam. This UNESCO World Heritage Site dates back to the 11th century and offers a glimpse into Vietnam's royal past. Explore the ancient structures and artifacts that have stood the test of time, showcasing the architectural prowess of past dynasties.
Religious spot
4.9/5(53K+ reviews)

Tran Quoc Pagoda

Immerse yourself in the serene beauty and rich history of Tran Quoc Pagoda, the oldest pagoda in Hanoi, Vietnam. Nestled on a small islet in West Lake, this sacred site offers a unique cultural experience for travelers seeking spiritual enlightenment and tranquility. With a history spanning over 1500 years, this historic pagoda holds a significant role in the country's development and attracts visitors from around the globe. Located on a serene island in West Lake, this historic pagoda offers a tranquil escape from the bustling city life, with its harmonious architecture and picturesque surroundings.
Hanoi - Sapa Bus by HK Buslines
Buses • From Hanoi, Lao Cai, Sapa

Hanoi - Sapa Bus by HK Buslines

Book now for today
Free cancellation
Instant confirmation
4.4 / 5
(9.6K) • 400K+ booked
From
US$ 14.59
Retail: US$ 15.45
Hanoi - Sapa Cabin Sleeper Bus by G8 Open Tour
Buses • Hanoi

Hanoi - Sapa Cabin Sleeper Bus by G8 Open Tour

Book now for today
Free cancellation
4.0 / 5
(1.2K) • 50K+ booked
From
US$ 16.89
Retail: US$ 17.85
Ha Noi - Sapa Royal Cabin Bus by Sao Viet
Buses • Hanoi

Ha Noi - Sapa Royal Cabin Bus by Sao Viet

Book now for today
Free cancellation
Instant confirmation
3.8 / 5
(428) • 10K+ booked
From
US$ 14.69
Retail: US$ 16.40
Hanoi|Noi Bai International Airport Private Airport Transfer
Private airport transfers • Hanoi

Hanoi|Noi Bai International Airport Private Airport Transfer

Bestseller
Instant confirmation
4.7 / 5
(40.8K) • 100K+ booked
From
US$ 6.95
Hanoi - Sapa Bus Seating Limousine Bus by HK Buslines
Buses • From Hanoi, Sapa

Hanoi - Sapa Bus Seating Limousine Bus by HK Buslines

Book now for today
Free cancellation
Instant confirmation
4.3 / 5
(184) • 10K+ booked
From
US$ 15.45
Hanoi - Halong Limousine Minivan by Ha Long Travel Limousine
Buses • From Hanoi, Ha Long

Hanoi - Halong Limousine Minivan by Ha Long Travel Limousine

Book now for today
Free cancellation
4.1 / 5
(485) • 10K+ booked
From
US$ 13.35
Retail: US$ 15.25
Hanoi to Sapa Sleeper Train Ticket
Rail passes • From Sapa

Hanoi to Sapa Sleeper Train Ticket

Book now for tomorrow
Instant confirmation
4.3 / 5
(2.4K) • 80K+ booked
US$ 37.85
Sale 5% off
Hanoi - Sapa Sleeper Bus by Interbus Line
Buses • From Hanoi

Hanoi - Sapa Sleeper Bus by Interbus Line

Free cancellation
4.6 / 5
(5.8K) • 100K+ booked
From
US$ 9.69
Sale 20% off
Ha Noi - Sapa Seating Limousine Bus And Vice Versa
Buses • Hanoi

Ha Noi - Sapa Seating Limousine Bus And Vice Versa

Book now for tomorrow
4.4 / 5
(3.6K) • 80K+ booked
US$ 19.30
Hanoi - Ninh Binh/ Tam Coc/Trang An/ Bai Dinh Minivan by Duy Khang Limousine
Buses • From Hanoi, Ninh Binh

Hanoi - Ninh Binh/ Tam Coc/Trang An/ Bai Dinh Minivan by Duy Khang Limousine

Instant confirmation
3.3 / 5
(178) • 4K+ booked
From
US$ 8.20
Noi Bai International Airport Transfer Service (HAN)
Car charters • Hanoi

Noi Bai International Airport Transfer Service (HAN)

Book now for tomorrow
Free cancellation
Instant confirmation
4.6 / 5
(72) • New Activity
US$ 8.80
Hanoi to Lao Cai Sleeper Train By Chapa Express
Train tickets • Hanoi

Hanoi to Lao Cai Sleeper Train By Chapa Express

Book now for tomorrow
4.1 / 5
(434) • 20K+ booked
US$ 45.19
Retail: US$ 52.89
Galliot Central Hotel
Hotels • Hanoi

Galliot Central Hotel

Instant confirmation
4.8 / 5
(124) • 200+ booked
From
US$ 28.71
Especen Hotel
Hotels • Hanoi

Especen Hotel

Instant confirmation
4.4 / 5
(342) • 100+ booked
From
US$ 19.03
Hanoi Charming House
Hotels • Hanoi

Hanoi Charming House

Instant confirmation
3.1 / 5
(609)
From
US$ 15.52
US$ 16.15
Bay Luxury Hanoi Boutique Hotel - No 9 Nguyen Truong To
Hotels • Hanoi

Bay Luxury Hanoi Boutique Hotel - No 9 Nguyen Truong To

Instant confirmation
4.4 / 5
(113) • 50+ booked
From
US$ 32.21
US$ 32.31
Holiday Emerald Hotel
Hotels • Hanoi

Holiday Emerald Hotel

Instant confirmation
4.9 / 5
(545)
From
US$ 47.85
Little Hanoi Deluxe Hotel
Hotels • Hanoi

Little Hanoi Deluxe Hotel

Instant confirmation
4.8 / 5
(586) • 100+ booked
From
US$ 46.6
Flora Centre Hotel & Spa
Hotels • Hanoi

Flora Centre Hotel & Spa

Instant confirmation
4.9 / 5
(266)
From
US$ 64.23
Hanoi La Selva Central Hotel
Hotels • Hanoi

Hanoi La Selva Central Hotel

Instant confirmation
4.7 / 5
(208) • 50+ booked
From
US$ 49.56
Millennium Hanoi Hotel
Hotels • Hanoi

Millennium Hanoi Hotel

Instant confirmation
4.4 / 5
(55) • 50+ booked
From
US$ 24.5
L'amant de Hanoi Hotel
Hotels • Hanoi

L'amant de Hanoi Hotel

Instant confirmation
4.8 / 5
(105)
From
US$ 57.4
Hanoi Delica Hotel
Hotels • Hanoi

Hanoi Delica Hotel

Instant confirmation
4.9 / 5
(411)
From
US$ 51.91
Hanoi Liliane Hotel and Travel
Hotels • Hanoi

Hanoi Liliane Hotel and Travel

Instant confirmation
4.9 / 5
(250) • 50+ booked
From
US$ 25.86
US$ 28.02

Reviews of Hanoi activities

Dayuman ********************
2026-10-08 10:52:36
Fantastic 5.0
Really enjoyed this cruise! Our guide, Mr. Binh, was super lively and entertaining from start to finish. He explained everything well inside the cave and made the trip even more fun. They took care of everything from pick-up to drop-off. Definitely worth the money!Highly recommended! 😊👍
Пользователь Klook
2026-10-14 10:47:43
Fantastic 5.0
⭐⭐⭐⭐⭐ An unforgettable day cruise in Ha Long Bay with Diamond Era Cruise! A magnificent ship, a luxurious atmosphere, a high level of service, and the breathtaking, incredible landscapes of Ha Long Bay. Everything was perfectly organized from start to finish. The comfort, delicious food, beautiful views, and attention to every detail made this day truly special. We would like to express a huge thank you to our tour guide, Tom! He is a wonderful professional, very friendly, attentive, and positive. Tom told interesting stories, helped with everything, created a wonderful mood, and did everything possible to make every guest feel comfortable. Thanks to him, the excursion became even more interesting and enjoyable! Ha Long Bay is a place that is definitely worth seeing with your own eyes. I definitely recommend Diamond Era Cruise to anyone who wants to spend an unforgettable day in Vietnam! If you are choosing a cruise in Ha Long Bay, this is an excellent option. Ruslan & Zoya
Klook客路用户
2026-09-16 12:04:17
Fantastic 5.0
A day trip to Ha Long Bay truly lives up to its reputation as "Guilin on the Sea"! 🌊 We departed from Hanoi in the morning, and the drive was about 2.5 hours. Although it was a bit far, seeing the emerald green water and thousands of limestone islands made it all worthwhile. Cruising among the islands felt like stepping into a traditional Chinese ink painting. For lunch, we enjoyed a seafood meal on the boat; the food was decent, but dining with the sea breeze was incredibly pleasant. The biggest highlights were kayaking and exploring the caves, where the water was so clear you could see the bottom. We climbed over 400 steps on Ti Top Island, and the panoramic view of Ha Long Bay from the summit was truly breathtaking. The day trip was indeed a bit rushed, so if possible, I'd recommend staying overnight. However, for a short experience, it offers great value for money, and I highly recommend it! Our guide, Johnny, was enthusiastic, thoughtful, and meticulous in his service – highly commendable.
Ivanna ********
2026-10-11 10:36:46
Fantastic 5.0
We had such a wonderful experience with Diamond Cruise in Ha Long Bay! The food was delicious, the trip was well-organized, and the views were absolutely stunning. Our tour guide was also amazing, very friendly, helpful! Everything made the trip so enjoyable and memorable. Definitely recommend Diamond Cruise to anyone visiting Ha Long Bay! 💙
클룩 고객
2026-10-14 23:48:17
Fantastic 5.0
Tour guide Minh is very kind. We took the bus from the Opera House. He called via WhatsApp before arriving and also contacted us the day before. After a 40-minute bus ride, we stopped at a souvenir shop where all the tour vehicles gather for a 30-minute break—be sure to use the restroom here. Upon arrival, we boarded a boat for lunch. All drinks are extra and must be paid for later. When you reach the island, you take an electric cart to the cave and then go somewhere in nature; it gets hot, so bring a portable fan. Afterward, you go kayaking and swimming, then head to the third deck to enjoy watermelon juice and music before returning. It's a great way to spend a day. Also, after visiting the island, there's a buy-two-get-one-free cocktail deal, which is a great time to have a drink. Oh, and watch out for jellyfish while swimming—be careful!
Lokesh **************
2026-10-15 10:30:01
Fantastic 5.0
Four cheers for Henry the Handsome. Thanks to Hercules Grand for making my trip memorable and remarkable. Some words for Henry, a guy with lovely gestures and well communication. Such a fantastic person with giving all his energy to describe each & every spots. Thanking you again.
Klook会員
2026-10-17 09:43:13
Fantastic 5.0
We were picked up at the hotel on the day of the tour, and the entire experience was extremely satisfying! We participated in mid-October, and thanks to the wonderful weather, Ha Long Bay was stunningly beautiful—many times more so than we could have imagined. In particular, the stairs on Titov Island are tougher than expected and you will work up a sweat (I climbed them in sandals). Older guests were climbing them too, so it should generally be fine, but it's best to be mindful of your footwear and take precautions against heatstroke. Our guide was cheerful, kept the mood lively, and entertained us the whole time with clear and easy-to-understand explanations. Although there are some low reviews, if you join with a mindset of "let's have fun!," this is a wonderful tour that will undoubtedly become your best memory.
Pretty **********
2026-09-26 10:35:49
Fantastic 5.0
Best value on money to have this trip. On time, the guide is nice and funny. The itinerary was top notch we were having so much fun. I like the cruise trip the most. it was clean and comfy. Even the food was nice. would love to get back
Klook User
2026-10-10 08:23:42
Fantastic 5.0
Great experience and wonderful Journey.. Plenty of vegetarian Indian food options also. It's a proper cruise and better than other companies. Worth every penny. The staff Tonyy is very nice and polite.

Hanoi at a glance

When is the busiest time to visit Hanoi?

Based on what travelers booked on Klook

Busier than usual Quieter than usual
+30%
+15%
Typical
-15%
-30%
+14%
Jan
+6%
Feb
-14%
Mar
+15%
Apr
+5%
May
+15%
Jun
Busiest +23%
Jul
-26% Quietest
Aug
-19%
Sep
-18%
Oct
-4%
Nov
+6%
Dec

Demand peaks in July (about 23% above a typical month) while August is much quieter (roughly 26% below a typical month), so expect heavier crowds in July and book early for popular activities. Based on Klook historical booking data.

When is Hanoi cheapest?

Find months that fit your budget.

$20
$15
Avg $16 Priciest $17 Cheapest $15
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun

Activities are typically cheapest in June (around USD 15), roughly 12% below the priciest month in March, so June combines lower prices with the quieter August season shown in demand. Based on Klook booking data, July 2025 – June 2026.

How far ahead should you book?

Plan ahead so you don’t miss out

0 daysLast-minute
2 daysTypical
12 daysEarly

Most travellers book very close to travel — about 2 days ahead — though some book up to 12 days early; during the July peak consider booking earlier than usual. Based on Klook booking data, February 2026 – July 2026.

Quick facts about Hanoi

Local weather

℉℃
  • DEC - FEB
    20°13°

  • MAR - MAY
    30°19°

  • JUN - AUG
    33°26°

  • SEP - NOV
    30°20°

General info
  • Time zone

    No time difference

  • Currency

    1USD = 25,903.95VND

  • Official languages

  • Best time to visit

    Spring

    Fall

    Tet Nguyen Dan

  • Recommended trip duration

What to know before visiting Hanoi

Quick snapshot of Hanoi’s travel rhythm

Hanoi’s Klook bookings are driven mainly by tours, events and shows, zoos & aquariums, massages and cultural experiences, so the city suits travellers who want a mix of sightseeing, performances and hands-on culture. Demand rises and falls through the year, giving clear high and low months for planning visits.

Best times to go and what to expect on prices

According to Klook booking data, July is the busiest month while August sees the lowest demand, with bookings tapering off again through September and October. Prices stay fairly steady for most of the year, with a typical upward blip around March and April and the lowest average prices typically in June. If you want smaller crowds and generally lower prices, aim for June through August; if you prefer peak-season atmosphere and events, July is when the city is at its busiest. Overall, demand and prices are mostly aligned except for that spring price increase that comes before the midyear demand peak.

Tips for travellers

Most experiences in Hanoi can be booked at short notice—travellers typically book around two days ahead, with many last-minute options available the same day. If you prefer extra choice for popular tours and cultural activities during the July peak, consider booking earlier (up to about 12 days ahead). Use Klook to compare available dates and lock in seats for shows or guided tours when you know your schedule.

FAQs about Hanoi

When is the best time to visit Hanoi?

When is the cheapest time to visit Hanoi?

How far ahead should I book activities in Hanoi?

How much do activities in Hanoi typically cost?

What is Hanoi best known for on Klook?