From publisher blurb: A bubbling stream cascades into a hole in the earth, leading to a series of underground watercourses and scintillating grottoes. Adventurers who delve within may discover odd mosses and fungi, a ruined temple complex, and the lair of a crystal-eating dream dragon. A classic expedition into the Mythic Underworld for characters of 1st to 2nd level. 57 keyed areas, rumour table, loot summary, dungeon background info, suggestions for expanding the dungeon. Keyed in a quick-reference, bullet point format. Statted for Old-School Essentials (B/X), usable with any vintage adventure game.