ATM Cave: Actun Tunichil Muknal (Cave of the Stone Sepulcher) is one of the most impressive caves in the Mayan World of Belize, named after a sacrificial chamber deep within the ATM Cave. This wet cave is located within the Tapir Mountain Nature Reserve near Teakettle village in the Cayo district.
Swimming and climbing is required when entering the ATM Cave. This is a predominantly wet cave with water levels ranging from ankle to chest height. The ATM Cave river system leads you through a labyrinth of dry chambers culminating at the cathedral-like main chamber, which is 350 meters in length, 50 meters in width. In this area you will spend about an hour to an hour and a half admiring with great care the many skeletal remains and artifacts; both pottery and stone tools. Toward the back of this chamber you will climb a ladder to get to the chamber of the Stone Sepulcher where you will see the skeletal remains of the famed crystal maiden.