The Legend of the Tunnels of Enlandin
Several hundred years ago the Mage of Enlandin built a dungeon complex beneath his castle to protect all of his treasures and to serve as a last defense. The army of a neighboring country attacked, pounding the walls with catapults and blasting his defenses with spells. The Mage and his faithful companions fled into the dungeon as the castle collapsed. Believing the Mage of Enlandin to be buried with his treasures, the attacking Lord ordered his men to dig through the rubble. Before they could finish the excavation, news came of an invading army of orcs to the North. The Lord, vowing to return, rode north to fight the orcs. The orcs caught his army in a narrow pass and slaughtered them to the last man.
Weeds grew over the ruins and people forgot about the Mage of Enlandin and the dungeons. A few years ago, a scroll was found that showed the location of the entrance to the tunnels of Enlandin. An enterprising group of dwarves dug out the entrance and entered the dungeons; they were never heard from again. Since that time, dozens of adventurers have tried their luck in the tunnels of Enlandin. Most never came back, though a few returned with fabulous treasures.