Ways to show scale without a human in your picture?

Looking for a list of techniques, maybe a specific book, on ways to show scale without a human in your picture.I know placing a human in your frame is an easy way to show scale, but I'm just not interested in waiting for a human to walk by in the perfect spot. Or posing a model in a spot.Architectural or landscape.Edit: not a banana via /r/photography https://ift.tt/bPtX72n