Rome is a city where the past meets the present on every corner. A secret cult practiced right next to the Circus Maximus, and their temple still remains beneath the street. See more in Season 1, Episode 4, "Rome's Hidden Empire." Join us as we explain the wildest, weirdest, most shocking moments of all time in History Countdown - histv.co/countdown #CitiesoftheUnderworld Subscribe for more from Cities of the Underworld and other great The HISTORY Channel shows: histv.co/SubscribeHistoryYT Check out exclusive The HISTORY Channel content: History Newsletter - histv.co/newsletter Website - histv.co/History Facebook - histv.co/Facebook Twitter - histv.co/Twitter "Cities of the Underworld" descends below the streets of major cities such as New York, Cairo, London, and Tokyo to explore the remnants of subterranean civilizations left buried there. HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network's all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.