This is interesting...
Large Iraqi Bunker Found
The bunkers were built into an old rock quarry north of the town of Karma, an insurgent stronghold in Anbar Province that lies near the city of Falluja. The bunker system is 558 feet by 902 feet, nearly equal to a quarter of the Empire State Building's office space, making it the largest underground insurgent hide-out to be discovered in at least the past year, if not during the entire war, said Capt. Jeffrey S. Pool, a spokesman for the Second Marine Division.
