Not sure about anyone else but this looks like a tunnel. I mean if it wasn’t a tunnel why would it be made out of wood as we know wood isn’t the best with water over time. Will have to look closer next time I am in this area running. 😏

A small, wooden tunnel entrance stands partially covered with leafless branches; it is surrounded by snow-covered ground and trees in a wintry forest setting.

Even ChatGPTs description of this says A small, wooden tunnel entrance. 🤷‍♂️