Another in our occasional series of history...

Travelling down south we spotted this oldie but a goodie. Not much left I am afraid!.
Was it part of a house, barn, smelter?
How long ago did they vacate the building?
Why did they leave?
So many questions so few answers, so if anyone can fill us in on some history it would be greatly appreciated.
The cache is accessible without pulling the structure apart. Cache responsibly .
Qba'g chyy svercynpr ncneg, vg vf abg gurer!
Gel gur srapryvar.