Also known as Aturbakurn (Nowhere in Ancient Dwarven) and Morenial Ath Tel’Que (The Oubliette in ancient Elven). Found in the Greyspine Mountains at the end of a ancient Dwarven Road. This was once a dwarven mine, then a dwarven vault, then an elven prison. All manner of treasures and horrors are inside.
Members of the Guild have determined that this place was once a Dwarven mine, then a Dwarven vault, then an Elven prison. A civilization of steam mephits are known to inhabit steam pipes that power the entire vault. A three-headed construct maintains and operates the pipes, though has been unable to complete its duties since the head of the Assessor was stolen, the head of the Accountant has the construct's body, and the head of the Engineer vanished into the archives of the guild after the last group failed in their quest to open the vault.
Attempts to open the massive door to allow entry into the vault were initially unsuccessful, but a group has made their way into the Vault in Opening the Door. The entry door is completely shattered and no longer impedes access inside...or outside.