Give Me Some Good Ideas Of Non Conventional Artwork?

Beauty and Art is in the eye of the beholder. Tracey Emmen's unmade bed was apparent 'art'. So, how about a phone booth? Rows of books in a library. An unusual building, athletes on a running track. Beautifully laid gardens, clouds in the sky - ever changing art. Pigeons on a roof, seagulls circling a fishing boat. Nowadays anything goes.

All the items laid out in a yard sale! An unusual heap of scrap from a wrecking yard! People in parking lots waiting for sales or department stores to open (large groups of people)! Storage rooms! Thrift stores!
Rain in gutters! Leaves in gutters!