Dos Ojos, Tulum, Mexico
Every avid scuba diver needs to dive in this crystal clear cenote at least once in their life. Deep in the cavern, it feels like another world. Although anyone can snorkel in this cenote, the real adventure is saved for divers. A cenote is a vast network of underground rivers, once worshipped by the early Mayans. Based on this photograph, you could probably see why (The Barefoot Nomad).