Intrepid travelers can test their limits—and their nerves—while navigating the channels of Cenotes Sac Actun—the longest underground river network in the world. Located in the jungles of Tulum, visitors descend into the river via an ominous looking rock well, complete with a well-worn wooden ladder. Because it’s rather remote and difficult to access, Sac Actun proves an ideal destination for travelers looking to explore the beauty and mystique of Mexico far away from the crowds.
Known by locals as the Pet Cemetery because of the large number of animal fossils, Sac Actun holds a spiritual place in Mayan tradition and offers travelers spectacular views of hidden waterfalls, dark caverns dripping with stalactites as they swim through fresh water streams. Snorkeling options are also available for those looking to check out the scene even further below the surface.