Guy goes urban spelunking, finds fully stocked underground safe house

Is this the teaser for Portal 3? The disarray, scattered equipment, and posters on the wall seem like the work of a thoughtful set decorator. But, as Sean Hannity likes to say, "Wow if true."


While walking through the territory of a factory, located in the industrial area of the city, I noticed a weird concrete block with a metal gate on the side of it. I opened it and a latter climb later I was in a dark, small tunnel leading to an underground bomb shelter/safe house.