Mictlan is the underworld of Aztec mythology. Most people who die would travel to Mictlan, although other possibilities exist. Mictlan consists of nine distinct levels.
Mictlampa, the Northern hemisphere of Mictlan according to the Codex Borgia.
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.
Yggdrasil, a modern attempt to reconstruct the Norse world tree which connects the heavens, the earth and the underworld
The legs of the god Vishnu as the Cosmic Man depict earth and the seven realms of the Hindu underworld of Patala. The feet rest on cosmic serpent Shesha.