Nuclear Waste Adventure Trail and Museum
Saint Charles, MO 63304
You can now stroll across 54-acres of remnants from the largest explosives factory in the US as well as a Cold War-era uranium refinery, which was on the site until it was abandoned in 1966. Twenty years later, the U.S. Department of Energy covered the hazardous waste with rocks. The 75ft-tall pile consists of 1.5 million cubic yards of covered-up TNT, mercury, asbestos, radioactive uranium, and radium for all to enjoy.