Beneath the streets of every major global city lies a dark and ugly secret. It's the hidden ingredient that has transformed primitive outposts into wondrous metropolitan areas, forcing mankind into radical urban and architectural directions, propelling advances in science and jump-starting revolutions. From the majestic skyscrapers of New York City to the dank catacombs of Paris, the stunning ruins of Rome, the mysterious sewers of London and the bustling markets of Cairo, a new series, "TRASHOPOLIS", premiering Sunday, November 6 at 8 pm. ET/PT on Smithsonian Channel, uncovers the startling truth about how these cities rose and flourished because of their garbage. (Source: Smithsonian Channel)