Name: Hidden Beneath The Cities
Released: 2026-02-25T00:00:00.000Z
Cast: Jeff Teravainen

TV Show · Documentary

Uncovers the extraordinary worlds that exist beneath major urban centres, from the tombs and wartime shelters of Naples to the manmade Royston Cave in Hertfordshire, England.

2026

Starring Jeff Teravainen

EPISODE 1

Underground Cities And Secret Chambers

Uncover a vast underground city in Turkey that served as a refuge for Christians and Jews. Investigate a mysterious chalk chamber in England, visit a secret Etruscan complex beneath an Italian wine cellar, and map an ancient tunnel network in Iran.
EPISODE 2

Crystal Cathedrals And Buried Bunkers

Marvel at the crystal caves and underground chapels of Poland's Wieliczka salt mine. Tour a secret Cold War bunker in England, unearth a 3,400-year-old royal settlement in Egypt, and try to solve the mystery of China's enigmatic Longyou Caves.
EPISODE 3

Hidden Hypogeum And Lost Letters

Explores a tomb in Naples that may contain a prince who inspired the legend of Dracula, desperate letters from Jewish rebels hidden in an Israeli cave, a 6,000-year-old labyrinth in Malta, and the oldest human burial in Africa.
EPISODE 4

Tunnels And Tombs

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