Cities of the Underworld

Prague is a city cloaked in mystery, with an underground to match. From quarries where Hitler may have stored his most powerful secret weapon to mines that doubled as Communist slave camps, Prague has surprising stories to tell.

Belize was the nerve center of the ancient Mayan civilization. Hundreds of ruins dot the landscape and reveal clues to bloody rituals.

Chicago was once a playground for mobsters and corrupt politicians. It wouldn't be the third largest city in the U.S. today if it weren't for the shady dealings.

From the outcome of bloody wars to the birth of saviors, Jerusalem has been at the center of prophetic revelations. Peel back the layers of this sacred subterranean landscape to uncover what was left behind... underground.

From a hidden Freemason tunnel and secret world of the Sandhogs, to mobster hideaways and gang escape routes, we're uncovering the secret societies that built New York—from the underground up.

From high-tech super bunkers, the underbelly of Capital Mall and DC's subterranean defenses, find out what goes on underneath the streets of our nation's capital.

The largest and most influential empire in history leaves clues to her greatness under nearly every street, as aqueducts, underground neighborhoods and one of the oldest sewer systems reveal many secrets.