Tuonela is the realm of the dead or the Underworld in Finnish mythology. Tuonela, Tuoni, Manala, Vainajala and Mana are used synonymously. Similar realms appear in most Finnic cultural traditions, including among Karelian, Ingrian, and Estonian beliefs. In Estonian mythology, the realm is called Toonela or Manala. Tuonela can also refer to a grave or a graveyard.
By the river of Tuonela (Tuonelan joella) by Akseli Gallen-Kallela, 1903
Lemminkäisen äiti by Akseli Gallen-Kallela. The mother of young Lemminkäinen has gone to the river of Tuoni to find the corpse of her dead son. One of the myths told in Kalevala.
Väinämöinen in Tuonela (1890) by Pekka Halonen
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.