9 Underground Places In Arizona No One Is Allowed To Enter

Arizona sits on one of the most contested and least understood geological landscapes in the American West. Beneath its plateaus and canyon walls run uranium deposits that fueled decades of Cold War extraction, cave systems that held wildlife secrets for millennia, and sealed mine shafts from a dozen boom-and-bust cycles that left behind contamination no one has fully quantified. This video counts down nine real underground places in Arizona, from a uranium mine sitting directly on the edge of the Grand Canyon whose radioactive drainage still leaches into creek water hikers are explicitly warned not to drink, to a network of Cold War missile silos scattered beneath the southern Arizona desert, seventeen of which were sealed shut and never opened again. Every site on this list is documented in National Park Service records, EPA filings, federal wildlife refuge management documents, or Department of Defense disclosures.