Jeongbang Waterfall: A picturesque waterfall cascading right in to the sea, one of Jeju?�s most legendary all-natural sights.great for hot summertime days. Jeongbang Waterfall is Asia's only waterfall that drops right into the ocean. Close by Cheonjiyeon Waterfall is Similarly gorgeous, specially when illuminated at nighttime. Jusangjeolli Cliff