"I like it when a flower or a little tuft of grass grows through a crack in the concrete. It's so ... heroic." -- George Carlin

Built a century ago, the S.S. Ayrfield hauled coal between Australian ports and carried supplies to U.S. troops stationed in the South Pacific during World War II. Now, mangroves grow in the decommissioned ship's hull, which sits in a boat graveyard in Homebush Bay, near Sydney.