Most hotels in Busan only allow check-in after 5 PM. We arrived at Busan Airport at 7 AM after taking a midnight flight, so we had to think of activities to do in the city before checking into our hotel. That's how we found Centum City SpaLand. We bought tickets online and decided to relax there first. This place is located inside a large shopping mall, right next to a city subway station, and has its own separate entrance (remember to look for the independent entrance; don't try to enter through the mall, as it only opens at 11 AM). Inside, there are separate areas for men and women, with pools of various temperatures. If you're interested, you can try the 'ice and fire' experience to relax your tired body. There are also many sauna-like rooms, including rock salt rooms and ice rooms, where you can sit or lie down as you please – there's definitely a room for everyone. Other amenities include a snack area, a large relaxation area where you can surf the internet and watch TV, and, most uniquely, a restaurant that offers DIY ramen. For one price, you can choose a packet of instant noodles from many varieties, and they provide a noodle cooker, side dishes (kimchi, bean sprouts, sausages, cheese, etc.), and seasonings. Guests can cook their own ramen, and once finished, it tastes a bit like Korean army stew – very interesting! We spent several hours here. It was our first 'attraction' and first experience in Busan. The admission and expenses were not high, so we highly recommend giving it a try!