Background of a "Mouse House" tree :-)
Discovered this on a walk. Nature made, living tree with a little hollow, mushrooms growing in the tree and the inner wood of the tree looking like a door!
If I survive making that bridge I'm working on, might make this into a mouse house tree ... but just in case, here you go.
"public domain" ... enjoy.
btw - it's a large photo taken with flash, may want to run it through a few filters for a better finish.