Follow our investigators as they gain access to restricted locations, go behind the barbed wire fences and ignore "Do Not Enter" signs to uncover the forbidden information Americans want to know. Could Denver International Airport conceal a massive secret underground doomsday bunker? What is really happening at New Mexico's White Sands Missile Range? Finally, will the NSA's new, billion-dollar data center collect electronic correspondence from everyday American citizens?

Did members of the cast and crew from John Wayne's 1956 film, The Conqueror, contract some form of cancer after exposure to nuclear fallout while filming? Pensmore Mansion is supposed to withstand earthquakes, explosions and tornado-force winds, but could it also hide a network of tunnels built for exclusive use by the Illuminati? The startling discovery of a young girl's skull, unearthed at the historic site of Jamestown, points to evidence that America's first settlers could have been cannibals.

Go inside Boston crime boss Whitey Bulger's hideout, hidden in plain sight in Santa Monica, CA. Visit Centralia, PA, a city destroyed by a 50-year fire -- but not a single house has burned down. Finally, how did a lone 5-foot, 100-pound man build Florida's mysterious Coral Castle, America's Stonehenge?