The vault of New Citadel is built in the footprint of the remains of an undermountain dwarven vault lost three centuries ago when Automatons rebelled against their masters. It is located on the northeast corner of the inner sea of Radavan.

There are several distinct districts of the vault city of New Citadel

• Dock Caverns - A series of sea-caves connect the vault of Citadel to the inner sea of Radavan
• Forge District - This artisan's district is one of the most famed maker of steel on the continent
• Fortress District - This district includes all the official buildings and functionaries of the city
• Market District - This fancy district
• The Old Vaults
• The Mellows
• The Mines
• Treasury District