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.