I live about five miles from this place:
It's the remains of a 12th century Cistercian foundation called Croxden Abbey, although the tree is of more recent date. It only lasted 359 years, and by the time I moved to this area the doors had already fallen off. Nevertheless, you can still sit on a wall and eat your sandwiches in the summer.
Somebody else took the picture. I don't know who. Sorry.