Orodruin

Orodruin, sometimes called Mount Doom, is the largest active volcano in the universe. It is dozens of kilometers high, and is constantly active. The origins of Orodruin are unknown, but there are several theories. The most prominent of which places it as the first created mountain in history, and by far the hottest. Located in Mordor, in acts as the forge of Sauron, and is the birthplace of the One Ring and the Infinity Gauntlet, to name a few.