I didn't go farther than the sign, just looked.
The wall looked like it was fitted with studs to stick some sort of exterior surface to the concrete.
Also, is that a train?!
Here's the gate out front.
And here's the other gate more out front.
Some interesting detail.
Everything appeared to be concrete.
Here's a view of that one building I went up behind. There was a larger one I didn't photograph.
But here's that gate.
Please remember that these photos are all copyrighted to me. If you want to use them in any way, there's a 90 per cent chance I'll give you my permission, and be able to give you a copy with a higher DPI.Copyright Daehanmindecline 2021