An adventurer could spend a lifetime down there.…however long or brief that may be.. The Undermountain box set is perhaps the largest dungeon TSR ever released. Definitely the largest if you include Undermountain 2 and the other expansions. The Ruins of Undermountain box set came with a number of components, but this post will focus … Continue reading Ruins of Undermountain (1991): Maps of a Megadungeon