As of summer months 2023, Cheongsapo Daritdol Observatory is free to visit but beneath upkeep after we visited (so partially open) ??we hope they deal with the cracked panels about the glass walkway ??eek! For the people on a tighter budget, you can find a lot of budget lodging in https://jejuweather00099.blogchaat.com/30469951/the-definitive-guide-to-busan-haeundae-trip-해운대고구려-budget