Actun Tunichil Muknal (the Cave of the Crystal Sepulchre), also known locally as Xibalba or ATM CAVE, is a cave in Belize, near San Ignacio, Cayo District, notable as a Maya archaeological site that includes skeletons, ceramics, and stoneware. There are several areas of skeletal remains in the main chamber. The best-known is "The Crystal Maiden", the skeleton of an adolescent (now thought to be a teenage boy), possibly a sacrifice victim, whose bones have been calcified to a sparkling, crystallized appearance.

The ceramics at the site are significant partly because they are marked with "kill holes", which indicate that they were used for ceremonial purposes. Many of the Maya artifacts and remains are completely calcified to the cave floor. One artifact, named the "Monkey Pot", is one of just four of its type found in Central America. The Maya also modified cave formations here, in some instances to create altars for the offerings, in others to create silhouettes of faces and animals or to project a shadow image into the cave. The cave is extensively decorated with cave formations in the upper passages.

This tour leaves Belize City at 7:30 am.

Visitors staying on Ambergris Caye and San Pedro will need to board the first ferry/ water taxi to Belize City...

A.T.M. Cave Tour From Belize City


Actun Tunichil Muknal Cave Tour - This Belize City A.T.M. Cave Tour (daytime) is  one of our Specialties!

Through work alongside archaeologists, ACTION BOYS BELIZE is one of only four companies within Belize awarded permission to lead groups into newly uncovered caves such as Actun Tunichil Muknal. Recent press coverage can be found in National Geographic Adventurer and the New York Times.




We will lead you through the lush subtropical forest of the Tapir Mountain Reserve to the crystal blue waters surrounding the entrance of this remarkable limestone cave. Through its passages we encounter sparkling centuries old stalactites and stalagmites and discover hidden chambers full of Maya artifacts and remains that reveal the rituals and ceremonies of a lost world.