Incredible shape for that old. Of course we don’t know how long it was actually there.
That area must be arid as one would have totally rusted and rotted to nothing in this area by that much time.
The only reason the place isn’t covered with old small towns and cabins is because they mostly got burned or scavenged/dismantled on the advent of reasonably priced off road capable vehicles like surplus jeeps, power wagons and the second+ hand Broncos, Scouts, etc...