Baekrokdam in Jeju Island (good weather)

You need to make an online reservation in advance to go to Baeknokdam. There are also two courses, and I climbed through Gwaneumsa Temple. It is shorter, but there are stairs of death. Honestly, any healthy Korean citizen can easily climb it if they take enough rest. I recommend bringing at least 500ml of water per person, and 1L per person. Hiking shoes are also essential. In fact, Nike running shoes are fine. My friend wore sneakers on an unplanned climb and got 3 blisters on both feet. Don't get depressed right away when you reach the peak of Baeknokdam because the weather is bad. It rained continuously before I climbed and 30 minutes after I climbed, but soon the weather turned terrible. If that doesn't work, just wait until next time and go down. I still recommend waiting for more than an hour.