I love gardens that use old recycled things cleverly and interestingly. Old beds, tea pots, wheelbarrows, pianos, furniture, claw-foot bath, gardening tools, windows, bottles, pallets etc. All mixed in with some mosaic for colour. Although some things can look tacky, like TV's or other plastic stuff, wood, metal and glass gives it a rustic fun feel. I'd much rather that than a formal garden! More ideas at Recycled Gardening and Garden Art or my 'House and Garden' Pinterest board.