Now THIS is cool. I would LOVE to explore some of these old sites. Unfortunately, most of the ones here in the Pacific North West are thoroughly fenced off. I may not have any problems with trespassing, but I don't like my skin getting caught on barbed wire XD
I would have loved to see this compound in its original state (are there any old photos of the original base?). I guess those holes were used for the cable strands that used to power the installation, but it almost looks like a foundry. The torch light from below gives the impression of fire burning.