My great grandmother got the last but one V2 in her back garden. It was about 80 yards from impact to their kitchen. Apparently the warhead didn't detonate but the impact shook out the windows and most of the roof off. Years later when I used to visit as a kid there were still bits lying about, noticeably a part of the combustion chamber. There was a rumour going around the family that the warhead was too far down to recover and it is still there.
I bet the people who flashed out about £550,000 for the property a couple of years ago don't know that.