Waterfalls are notoriously slippery, so trying to climb them without specialized gear is usually a bad idea, but at the Bua Thong Waterfalls in Thailand’s Chiang Mai province visitors can climb almost vertical falls using only their hands and feet.
The so-called Sticky Waterfalls get their name from the incredibly grippy limestone rocks that the water runs over. They feel like a very hard sponge to the touch and even though they can be described as prickly, you can easily climb them barefoot without hurting yourself. Because no algae or slimes adheres to this callous rock surface, the limestone creates enough friction to prevent slipping, allowing anyone in decent physical shape to climb even the steepest parts of the waterfalls.
