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

TV Show · Documentary

See why every city conceals a secret world just waiting to be discovered. Peel back layers of soil, stone, and concrete and discover prehistoric sanctuaries, hidden crypts, and marvels of engineering that are a world away from the streets above.

2026 · 43m

Starring Jeff Teravainen

EPISODE 1

Episode 1

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

Episode 2

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

Episode 3

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.
EPISODE 4

Episode 4

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.
EPISODE 5

Episode 5

Explore a labyrinth built beneath Washington, D.C., by an eccentric entomologist. Admire a fresco-filled Roman mausoleum, spot intricate chambers carved into Colombia's volcanic rock, and see a sprawling network of hand-dug tunnels in Liverpool.
EPISODE 6

Episode 6

Walk the service tunnels hidden beneath Emperor Hadrian’s lavish villa in Italy. Uncover a chilling mass grave from the Thirty Years’ War in Germany, find the foundations of a Roman basilica in London, and glimpse Neolithic life on a Danish island.