I was in Van Nuys a couple of years ago and took this photos of a treehouse.
I’ve never built a treehouse… I think they’re cool and interesting, and I enjoy building things…. but I don’t want to put nails and screws into a living tree. It’s not good for the tree, and one day when the tree has grown around it, someone (like me) might cut into the nail with a chainsaw when the tree is dead. Metal in trees is real bad for a chain blade, and it might snap causing injury. But still, I am fascinated with treehouses, and tend to photograph them when I see them.