Many gardeners plant things in old tubs and toilet seat rounds. You might ask in gardening and specific to the city you live in. Some may let you take pix of their out of place things.
Also go into a crafty what not shop. Often people place chairs on walls and window frames topsy turvy for effect.
Make things out of place in your own setting if nothing else. Place a comfy chair in a rock garden, a table setting in the dirt, a beauriful painting outside, dandylions or other clearly defined weeds in a planter, beer cans in a flower garden, a shoe hanging on a telephone wire, a hobo sleeping in a park. There are really endless subjects if you look for them.