The Ak’tun Kan Caves are also known as the cueva de la serpiente (cave of the serpent) due to a local legend that mentions a large snake living here. Some of the caves have bats hanging from the ceilings, but you’re unlikely to run across any actual snakes inside. These limestone caves have several different chambers and are dotted with oddly shaped stalactite and stalagmite formations. Signs point to the various formations and provide their names, which include Whale’s Tail, Frozen Falls, and the Gate of Heaven.

There are lights in some caves, but it’s still recommended that you bring a flashlight. You can also rent flashlights at the cave’s entrance. The terrain can be uneven and slippery—plan to wear sturdy shoes with good traction.