Thank you to the Korean guide! This one-day trip to Jeju Island was very well-organized, with convenient transportation and meeting point from the Jeju Shilla Duty Free parking lot. The first stop was Seopjikoji, with its wide-open sea views and beautiful photo opportunities. Then, we went to Seongsan Ilchulbong Peak, which required a bit of walking, but the scenery was really worth it. After that, we took a boat to Udo Island (ferry tickets are at your own expense, 10,500 KRW). The bus drives directly onto the boat, and you can bring snacks to feed the seagulls on board (I recommend using Saewoo Ggang shrimp crackers). We stopped at three attractions on the island (mandatory transportation fee of 20,000 KRW at your own expense). Black Sand Beach is a very unique place on Udo Island. You can choose to take the small cat speedboat at your own expense (about 25 minutes, 30,000 KRW), which is very exciting, but unfortunately the weather was bad and it was raining, and the time was too tight to take good photos. We had lunch at "Udo Prince" near Dongangyeonggul Cave. The taste was good, and the rest was just right. There was also peanut ice cream for sale next door, but the guide recommended that we eat it at the next stop🤣. Finally, we went to Hagosudong Beach, where the sea water is very beautiful and perfect for a leisurely stroll. There are cafes along the beach road where you can have ice cream. On the way back, we went to Woljeongri Beach, which has a relaxing atmosphere and is a great place to take pictures and relax. You can also buy cloud-shaped cookies here. Finally, we returned to Dongmun Market, which is convenient for eating and buying souvenirs. Overall, the pace of the trip was just right. There were many attractions, but it wasn't too rushed. It's suitable for first-time visitors to Jeju who want to see sea views and popular attractions all at once. Overall, I was satisfied with the experience.