Longest known exposure photograph ever captured using a beer can
When I was in college I spent a summer abroad at an art school in the south of France.  It was a medieval village, and so instead of dorms everyone was scattered in various places throughout this village on a hillside.Anyway, a couple of our classmates turned their entire room into a pinhole camera — a “camera obscura”, where the image of the whole valley was projected upside down on the wall.It was pretty magical being inside of that.