Series synopsis
Hidden Beneath the Cities is an American documentary television series that premiered on National Geographic on April 24, 2026.
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.
Premise
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.
Episodes
This series spans 1 season with 10 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 10 | April 24, 2026 | May 22, 2026 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Underground Cities and Secret Chambers Scientists uncover a city, a chamber, and a complex, and map a tunnel network. |
April 24, 2026 |
| 2 |
Crystal Cathedrals and Buried Bunkers Scientists uncover salt chambers, bunkers, old kingdoms, and mysterious caves. |
April 24, 2026 |
| 3 |
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. |
May 1, 2026 |
Production
Release
| Original network/platform | National Geographic |
|---|---|
| First aired | April 24, 2026 |
| Last aired | May 22, 2026 |
| Status | continue |