A NASA decontamination chamber. A dynamo built by Thomas Edison. Salvaged machinery from a U.S. Army ammunition plant. Those are just a few of the things you’ll find at Dr. Evermor’s Forevertron, a sprawling sculpture park in North Freedom, Wisconsin. The park also holds the world’s largest scrap metal sculpture, built by park founder Tom Every. “We’re only here for a short time,” says Every. “I’d like to leave something on the planet.”