In a dump, used glass soda bottles are a toxic eyesore. But when rolled and softened by the waves, then spit out onto a shore, they become something extraordinary: colored pieces of stone.

Luke Hartmann hauling traps off the Deer Isle coast. All on water photography taken by Spike Smigelski.

Have you ever found a piece of sea glass at the beach? As a kid, finding sea glass was always a really special moment, as ...