|Monsters||Decayed, Horror, Invader|
|Adjacent Zones||Lost City|
|Area Level Normal||17|
|Area Level Nightmare||46|
|Area Level Hell||85|
The Ancient Tunnels apparently once served as a sewer for the Lost City; the dungeon architecture is identical to the sewers under Lut Gholein. Random Unique monsters spawn toward the bottom, and your reward is a sparkling treasure chest of possible high-ticket items.