Orodruin is the Elvish name for Mount Doom in J.R.R. Tolkien’s The Lord of the Rings.
Mount Doom is the volcano in Mordor where Sauron forged the One Ring. Tolkien gives it the Sindarin name Orodruin, meaning “Mountain of Blazing Heat.” The mountain is also called Amon Amarth, or “Mount Doom,” after its eruption revealed Sauron’s return to power at the end of the Third Age.
The volcano is central to the plot because the One Ring can be destroyed only in the fire where it was made. Frodo and Sam travel across Mordor toward its Cracks of Doom, while the armies of the West create a diversion at the Black Gate. Orodruin is sometimes confused with Ered Lithui, the Ash Mountains, which form part of Mordor’s northern boundary. Barad-dûr is another nearby landmark, but it is Sauron’s fortress rather than the volcano itself.