Desperate for tourism, hundreds of small towns across the U.S.A. claim the "world's largest" something, from 15-foot fiberglass strawberries to 40-foot concrete pheasants. World's Largest, a feature documentary, visits 58 such sites. Most prolific among them, Soap Lake, Washington's five-year struggle to build the World's Largest Lava Lamp. By documenting these roadside attractions, World's Largest captures the changing, perhaps even vanishing, culture of small-town America.