I remember a tree

I remember a tree that seemed to have a face, and used to scare me when I was a child. There were knot holes where branches had broken off that looked like a face. I remember watching the Wizard of Oz and seeing the wicked witch. For some reason the tree and the witch were linked in my mind. I know I used to walk home through the park sometimes, but I wouldn’t go down that path if it was getting dark.. I also remember walking on the top of an old stone wall, balancing on the top of it, pretending to be a gymnast…. This was over forty years ago. When I look at photos of the park it has a lot more civilised appearance!