All Trust is Foolish
The Underdark is a vast subterranean realm, inhabited by drow, mindflayers, abeloth, and other strange, sinister creatures. It extends well past the dungeons made by surface dwellers, encompassing all the myriad caverns, tunnels and complexes that exist for all intents as a parallel world beneath the surface.
- The Upperdark is the first three miles below the surface. It is here where the surface dwellers and those in the Underdark most often meet. It is considered the safest region of the underdark.
- The Middledark is located three to ten miles below the surface, this layer is where most of the Underdark cities are located.
- The Lowerdark is ten miles or more below the surface and is home to the most dangerous creatures of the Underdark and also where the famed drow city of Menzoberranzan is located.