Shadowdark

The Shadowdark was an underground domain of the Underdark situated in the Deep Wastes just beneath Shadowdale.

Geography
Covering a 120-mile area of the Upperdark, the Shadowdark was largely centered around the village of Shadowdale. Riddled with tunnels, springs, lakes and even geothermal locations, the Shadowdark made a number of connections with surface locations around the dale and gave ample places for the drow in the area to hide.