Mount Doom is a volcano in J. R. R. Tolkien's Middle-earth universe. It is located in the heart of the black land of Mordor and approximately 4,500 feet (1.4 km) high. Alternative names, in Sindarin, include Orodruin ("fiery mountain") and Amon Amarth ("mountain of fate"). The Sammath Naur ("Cracks of Doom") is a chasm located deep within the mountain.
The mountain represents the endpoint of Frodo Baggins' quest to destroy the Ring which is recounted in The Lord of the Rings. The chasm is the site where the One Ring was originally forged by the Dark Lord Sauron and the only place it can be unmade.
Tolkien is reported to have modelled Mordor on the volcano of Stromboli off Sicily, which he once saw during a cruise.