Tuonela, also called Manala, is the underworld of Finnish and Karelian folk mythology, best preserved through the Kalevala, Elias Lonnrot's nineteenth-century compilation of orally transmitted Finnish oral poetry, in which it is described as a dark, still realm surrounded by a black river, reached by the living only with great difficulty and danger, ruled over by Tuoni, the god of death, and his family.
Unlike many judgment-centred afterlife realms elsewhere in this atlas, Tuonela in the Kalevala material is portrayed less as a place of moral reckoning than as a genuinely dangerous, physically separate country that a hero might attempt to enter and, crucially, might hope to leave again, most famously in the epic's account of Vainamoinen's journey there to obtain the words needed for a boat he is building, and in the tragic tale of Lemminkainen, killed and dismembered in Tuonela before his mother recovers his body and restores him to life through ritual magic and grief. That narrative pattern, a living hero crossing into and, at least sometimes, returning from the land of the dead, places Tuonela within a broader worldwide category of accessible underworld realms alongside figures such as Orpheus's journey into Hades.