Xibalba, roughly translated as "place of fright", is the name of the underworld in Maya mythology, ruled by the Maya death gods and their helpers. In 16th-century Verapaz, the entrance to Xibalba was traditionally held to be a cave in the vicinity of Cobán, Guatemala. Cave systems in nearby Belize have also been referred to as the entrance to Xibalba. In some Maya areas, the Milky Way is viewed as the road to Xibalba.

The underworld, also known as the netherworld or hell, is the supernatural world of the dead in various religious traditions and myths, located below the world of the living. Chthonic is the technical adjective for things of the underworld.