Ask HN: What do people take pictures of?

I think a lot of value can be extracted from pictures people take on a daily basis. For example, pictures of restaurant menus and foods can be extremely useful. I still go to restaurants without seeing their menu, and ordering items without seeing what they look like. I think that's a problem, and the data (pictures) already exist across thousands of cameras/phones.

Other than pictures of food, what other things do a lot of people take pictures of?