THE YUTHLUGATHAP SWAMPS contains a large-scale hex map, introductory information, geographical notes, and detailed encounters keyed to the map. This module presents a complete setting for ADVANCED DUNGEONS & DRAGONS, intended for use by experienced Dungeon Masters. It can be used on its own, in conjunction with your own campaign world, or as the northwest quarter of a larger campaign area that includes BARRENS OF CARCOSA, JUNGLES OF THE K'NAANOTHOA, and THE MOUNTAINS OF DREAM.
Luigi Castellani's cover art depicts the death of an apatosaurus in the mysterious enclave within the swamps known as the Dinosaur Graveyard.