There were feral kitties that lived under one of the buildings where I lived when I was about 10. From my window I could see across to the building where they lived- there was a hole that went down into the crawlspace and they would come out at night. During the day, the mother might come out sometimes and would occasionally let me pat her, but the kittens were quite wild and very shy.
One night I looked out my window and saw the HUGEST raccoon squeeze himself into that hole in the building.
No more feral kitties after that :(