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TVPGHDHidden Beneath the Cities1hNational Geographic

Scientists uncover a city, a chamber, and a complex, and map a tunnel network.

Scientists uncover a city, a chamber, and a complex, and map a tunnel network.

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Hidden Beneath the Cities

S1, EP1 "Underground Cities and Secret Chambers"

Scientists uncover a city, a chamber, and a complex, and map a tunnel network.

Hidden Beneath the Cities

S1, EP2 "Crystal Cathedrals and Buried Bunkers"

Scientists uncover salt chambers, bunkers, old kingdoms, and mysterious caves.

Hidden Beneath the Cities

S1, EP3 "Hidden Hypogeum and Lost Letters"

Investigate a tomb in Naples that may contain a prince who inspired the legend of Dracula. Read the desperate letters of Jewish rebels hidden in an Israeli cave, tour a 6,000-year-old labyrinth in Malta, and see the oldest human burial in Africa.

Hidden Beneath the Cities

S1, EP4 "Tunnels and Tombs"

Crawl through a notorious brick-lined tunnel system in a historic Florida neighborhood. Open a window into the lives of elite Greek families in Naples, explore a three-story underground city in Iran, and find 2nd-century barracks buried in Rome.

Uncovers the extraordinary worlds that exist beneath major urban centers, from the tombs and wartime shelters of Naples to the manmade Royston Cave in Hertfordshire, England.
Original Air Date: Feb 25, 2026
Rating: TVPG
Playback: HD
1 seasons available on demand
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