Yangshuo’s Longmen Water Cave served as a refuge for local villagers during the Japanese invasion of World War II, and with all the maze-like passages, nooks and crannies, it’s easy to see why. Today, boats ferry you into the cave beneath the low-hanging stalactites. After walking, climbing and sometimes crawling through the cave, you’ll be rewarded with a mud bath and a swim in the natural underground pool, complete with a waterfall.
Unlike many of the more developed caves in the area, the Water Caves are not illuminated, so you’ll have to carry a flashlight to find your way. While the cave maintains a comfortable temperature throughout the year, it’s most pleasant for swimming from April to September.