the rock house was one of 4 used as machine gun emplacements(they used rock so as to be hidden from the air)used during the ww2. the electricity supplied the aircraft business. the indoor shots were horrible the battery is low-but that's another story-96 died during the building-I guess that we have osha now!-this place is HUGE and you can't go into the dam because of 9-11. I'm off to the town of lights-vegas!-charlie