Mount Doom is located in Mordor in J.R.R. Tolkien’s Middle-earth.
Mordor is the dark land in the southeast of Middle-earth and the realm of Sauron during The Lord of the Rings. Mount Doom, also called Orodruin, stands there as the volcano in which the One Ring was forged and the only place where it could be destroyed.
The geography makes Mordor central to the story’s final quest. Frodo Baggins and Samwise Gamgee travel there with the Ring, while the armies opposing Sauron try to divert attention from their mission. The land is surrounded or protected by mountain ranges and includes locations such as the Black Gate and Barad-dûr.
Mordor is often confused with Gondor because the two regions are neighboring powers in the late Third Age. Gondor is a human kingdom opposing Sauron; Mordor is Sauron’s stronghold. Rohan is another human kingdom farther west.