This underground lair is accessed through two ladders from above the ground. One ladder is in the center of the wilderness area, guarded from within the cages of the Lesser Demons. Once there, you will have access to the many monsters. The foes there are high-leveled and have made it a popular training area for veteran warriors. However, if you wish to test your prowess on the King Black Dragon, the other ladder is located on the western-most point of the area and leads to the section of the Lava Maze hidden away from the rest. Here, you will find a lever that will send you straight to the dragon's cavern.
Hidden in this dungeon is a Runite rock. Please visit the mining maps section for more information about this Runite rock.