Clueless. But I must say that these are really cool and interesting shots. I can't wait to find out and I hope this is a museum run by folks who are preserving the structures and have it open to the public.
East broadtop is right . They were taken at a heigth of between 300 and 800 feet with a Dji phantom . Thought I'd give this a shot on my photography ramblings and I' m findinding it really fascinating . Adds a whole new perspective !