Before: Broken doorknobs, After: Patio flooring

Doorknobs, salvaged steel discs, and a stovetop burner make up this cobblestone-esque patio floor. The knobs' chrome and brass finishes brighten the shady patch of designer Matthew Levesque's (matthewlevesque.com) patio. And, set in soil, the knobs are surprisingly stable.

 

Cost: Free--salvaged (with permission)