Menzoberranzan

The City of Spiders, perhaps the greatest and well-known of the drow cities. Located in the Underdark in a region known as the Northdark, Menzoberranzan is relatively close to the dwarven hold of Mithral Hall and the gnome city of Blingdenstone. Some of its tunnels to the surface lead to areas in the High Forest, with drow using these paths to launch attacks on their surface kin. 

Approximately 20,000 drow live in the city, with an unknown (but very large) number of slaves of many races. 

Menzoberranzan

The Darkness Below vulgartron