So .. you sit around the house .. uninvited, drinking tea and whatnot .. and twiddling your thumbs for a while ... dreaming of pie... then you decide that there are too many curious things out there and it might be fun to find out what those things are.
A cottage clearing has probably been carved out of the woods by the owner of the cottage. A large Oak tree stands prominent in the middle of the clearing. A pile of wood is stacked beside the cottage, probably used for the wood stove.
The oak tree is rather large and around on one side it is hollowed out and there is a hole in it. The hole is rather large and a person might be able to squeeze inside. The hole is very deep though and it cannot be seen how deep it goes.