Why was it hidden?
And what could possibly go wrong?
The barbarian invasions (Goths, Vandals, etc) found rich pickings and then comfortable living in Roman Hispania. Not all sites survive from antiquity (for some reason, heh), but abandoned sites and structures tend to leave very little visible trace. The barn that was part of this homestead was taken down in the 1950s, and by the time I was toddling around, there was literally no trace it had ever been. I believe my reaction to this information was, “we had a barn?”
Nice little snapshot of late Roman Spain etc:
https://en.wikipedia.org/wiki/Vandals