Alright, so I had to go do a site repair today for work and there is this huge abandoned (microwave, I think) dish on the site, it points south. Until I did a lot of research today I had no idea what it was used for.
The tower on site has an USAF tag on it and there is an open manhole cover that goes down about 6 feet then opens up in to something that is full of water.
There is a huge ass feed-line for the dish goes into the ground and disappears.
This site is in northern IL.
So before we rented a spot on the tower and VHF'd it up it was an "United States Air Force (USAF) Distant Early Warning (DEW) Line Training Station", that worked with a site in different site in Streator, IL.
Sorry about the shitty photos and typing, I did this from my phone.
https://picasaweb....sRgCL-o37ySheyhlQE (edits: trailing to make this less shitty)