This looks like a small building at first glance, but I think it was made out of solid concrete. I have no idea what it's function must have been. There are a lot of oil wells around it, so I assume it must have been something related to the oilfield industry.

Camera: Pentax PC-700
Lens: 35mm, f/2.8
Film: Fuji Film Superia X-TRA 400 (expired on 12/2020)
Date: March 12th, 2025, 2.14 p.m.
Location: Herald, Illinois, U.S.A.

Developing Chemicals: Unicolor C-41
Water pre-soak: 1 minute at 102 degrees
Developer: 3 ½ minutes at 102 degrees
Water rinse: 2 minutes (to keep chemicals clean)
Blix: 6 ½ minutes at 102 degrees
Water rinse: 2 minutes at approx. 100 degrees
Stabilizer: 1 minute at room temperature
Water rinse: 2 minutes

Pentax PC-700 Superia X-TRA 400 First Roll 26hff