
1) Forgotten Realms location
Found on
https://www.crosswordclues.com/clue/undermountain

Undermountain is a vast labyrinth of caverns in the Underdark under the area of Waterdeep in the fictional world of the Forgotten Realms campaign setting for the Dungeons & Dragons fantasy role-playing game. This dungeon has been used as an adventure setting for several computer games. ==Creative origins== Undermountain was created by Ed Greenwood...
Found on
http://en.wikipedia.org/wiki/Undermountain
No exact match found.