Name: Hidden Beneath the Cities
Genre: Documentary
Released: 2026-04-24

Overview

Uncovers the extraordinary worlds lying just below modern urban centers. Beneath the streets of stone, soil and concrete exist hidden realms shaped by survival, ritual and imagination. 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.

Seasons

Season 1

10 Episodes

2026

E01

Underground Cities and Secret Chambers

4/24/2026·45m

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

E02

Crystal Cathedrals and Buried Bunkers

4/24/2026·45m

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

E03

Hidden Hypogeum and Lost Letters

5/1/2026·45m

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.

E04

Tunnels and Tombs

5/1/2026·45m

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.

E05

Labyrinths and Legends

5/8/2026·45m

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.

E06

Subterranean Secrets and Forgotten Foundations

5/8/2026·45m

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.

E07

Buried Battleship and Viking Victims

5/15/2026·45m

Examine a Revolutionary War-era ship found in the rubble of the World Trade Center. Uncover a mass grave of Viking settlers in Oxford, visit the resistance bunkers of the Warsaw Ghetto Uprising, and tour a necropolis full of burial jars in Corsica.

E08

Bones Beneath and Coffins & Coins

5/15/2026·45m

Dig beneath the Treasury in Petra, Jordan, to find a sealed tomb containing 12 skeletons; unearth a hoard of coins hidden during a Scottish massacre, question the purpose of an empty grave in Peru, and inspect a Bronze Age leader's coffin in England.

E09

Subterranean Seoul and Railway Revealed

5/22/2026·45m

Discover a massive underground chamber hiding under the Seoul subway. Visit a medieval knight's limestone tomb in Poland, examine Roman ruins beneath a church in England, and ponder the identity of a 10-million-year-old fossil in Los Angeles.

E10

Secret School and Concealed Castle Cemetery

5/22/2026·45m

Visit a strange wood-lined tunnel beneath a Copenhagen train station. Locate one of North America's earliest schools for Black children in Virginia, excavate a warrior cemetery in Finland, and unearth a women-only burial plot beneath a Welsh castle.

Hidden Beneath the Cities(2026–)

Overview

Seasons

Season 1

Underground Cities and Secret Chambers

Crystal Cathedrals and Buried Bunkers

Hidden Hypogeum and Lost Letters

Tunnels and Tombs

Labyrinths and Legends

Subterranean Secrets and Forgotten Foundations

Buried Battleship and Viking Victims

Bones Beneath and Coffins & Coins

Subterranean Seoul and Railway Revealed

Secret School and Concealed Castle Cemetery

Where to Watch

Stream

Where to Watch

Stream

Season 1

Underground Cities and Secret Chambers

Crystal Cathedrals and Buried Bunkers

Hidden Hypogeum and Lost Letters

Tunnels and Tombs

Labyrinths and Legends

Subterranean Secrets and Forgotten Foundations

Buried Battleship and Viking Victims

Bones Beneath and Coffins & Coins

Subterranean Seoul and Railway Revealed

Secret School and Concealed Castle Cemetery