Is there anything strange or unusual about your house that you enjoy?

Frogs like to hangout on our window screens in the evening during spring and summer months. It always makes me giggle when I see them. The picture is tonight’s visitor. (sorry about the poor quality of the pic. I’ve never encountered anything like this until I moved to this house.

Is there anything different or quirky about your house you would like to share with the community? Strange sounds or hidden rooms? Anything?