Comprising 22 sub-levels and approximately 930 keyed locations.
The dungeon’s history is layered, reflecting its long transformation. Originally a dwarven fortress, it later became the prison of a tyrant where inmates were forced to excavate their own cells. Following the tyrant’s fall, various factions—including warring prison gangs, cultists, and goblinoids—claimed different levels. Gunderholfen - G. Hawkins - DriveThruRPG gunderholfen pdf
Includes the nearby city of Longfelt , complete with its own NPCs, factions, and adventure hooks. various factions—including warring prison gangs