This is another quick UV unwrap of a photo from Wikimedia. It was done with Blender and includes no additional textures, just the source photo. Kinda derpy, but at <700 tris... game engine ready? Just don't fall down the elevator shaft!
The photo is "Salbert hill fortifications. Old NATO station (lightpainting)." by Thomas Bresson.
https://commons.wikimedia.org/wiki/File:2011-05-08-f-salbert-otan-3.jpg
From Wikipedia:
Fort du Salbert, also known as Fort Lefebvre, was built between 1874 and 1877. It was named after General François Joseph Lefebvre. It forms part of the Séré de Rivières system fortifications in the fortified region of Belfort in northeastern France. It is located at the summit of Salbert hill to the northwest of Belfort. During the early years of the Cold War it briefly served as an air defense coordination center.
https://en.m.wikipedia.org/wiki/Fort_du_Salbert