Middle-earth locations
Khazad-dûm was the ancient home of the Dwarves under the Misty Mountains. It was a large underground city. It also has a system of mines under it. The city was the only place in Middle-earth where the precious metal mithril could be found. This made the dwarves very rich. Khazad-dûm was founded by Durin the Deathless early in the First Age.