Middledark

The Middledark was located three to ten miles below the surface of Toril where most of the Underdark cities were located.

Caverns and tunnels

 * Labyrinth
 * Traaskl Thorog

Lakes

 * Deeplake

Settlements

 * Boneyard
 * Ched Nasad
 * Dunspeirrin
 * Eryndlyn
 * Fraaszummdin
 * Gatchorof
 * Gracklstugh
 * Guallidurth
 * Kuragolomsh
 * LoobliShar
 * Maerimydra
 * Mantol-Derith
 * Sloopdilmonpolop
 * Sshamath
 * Sphur Upra
 * T'lindhet
 * Undrek'Thoz
 * Yathchol

Other locations

 * Ammarindar
 * Chaulssin
 * Llurth Dreir