Idk if anyone has mentioned this place before, but nestled not too far from me in the Welsh hills is a place known as "The Cloud House".
Check it out, photographers/explorers are forever visiting. Basically a fully furnished, abandoned farmhouse last lived in in probably the early 80's. The owners just upped and left one day for whatever reason and didn't return. Literally in the middle of NOWHERE in Snowdonia.
Also, see "Red Dress Manor", also near me.