My dungeon was built for racing. Participants get dropped from the throne room into the flame pit; first person to reach the Tok-Xil treasure room wins a prize. Bone cage, marble doors, and most importantly, teleport traps (3 of them) ensure that winning the race is somewhat difficult. :) Steel dragon's room does not have a door so he occasionally roasts unsuspecting passers-by.
Servant’s bedroom, master bedroom, and possibly the Quest Hall upstairs will be replaced with Skill Halls to display monster heads and big sharks.