5 Incredible Underground Places You Can Visit in the U.S.

Send us Fan Mail Episode 155 What do beer tunnels, a Cold War bunker, a buried city, a salt mine, and an underground citrus garden have in common? They're all hidden beneath our feet. This week we're exploring five fascinating underground destinations across America, each with an incredible story to tell. We'll visit: Cincinnati's historic lagering tunnels beneath Over-the-RhineThe secret Cold War bunker hidden beneath The Greenbrier ResortStrataca, the underground salt mine museum in KansasS...