Cities of the Underworld

Peel back layers of history with Cities of the Underworld on The History Channel. Skyscrapers loom overhead, taxis honk their horns and street vendors shout as they peddle their wares. But the buzz of the city above is nothing compared to the powerful pull of the past and the amazing secrets simmering just beneath one's feet! We travelled hundreds of feet beneath the pavement to reveal hidden worlds that literally make up the foundations of today's greatest cities.