Mount Doom is a fictional volcano in J. R. R. Tolkien's Middle-earth legendarium. It is located in the north-west of the Black Land of Mordor and close to Barad-dûr. Alternative names, in Tolkien's invented language of Sindarin, include Orodruin ("fiery mountain") and Amon Amarth ("mountain of fate"). The Sammath Naur ("Chambers of Fire"), made by Sauron in the Second Age, is a tunnel, leading to an interior platform with molten lava below it, located high up on the mountain's cone. It was here Sauron forged the One Ring during the Second Age.

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 destroyed.

History

When Sauron began searching Middle-earth during the Second Age for a permanent dwelling place, his attention was immediately drawn to Mordor, and especially to Orodruin, whose power he believed he could use to his advantage. He subsequently established his kingdom based around Orodruin and "used the fire that welled there from the heart of the earth in his sorceries and his forging". The most famous of Sauron's creations forged at Mount Doom is the One Ring. In The Fellowship of the Ring, Gandalf explains that the materials of which the Ring is made are so durable and the enchantments with which it is imbued so powerful that it can only be destroyed in the Cracks of Doom where it was made.