Hidden Beneath the Cities · SEASON 1

Underground Cities and Secret Chambers

Episode 1 · 2026-04-24

★ N/A

Hidden Beneath the Cities poster

Season 1Episode 1★ N/A/10

Documentary

Episode overview

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

45 minutes

1. Underground Cities and Secret Chambers2026-04-24

2. Crystal Cathedrals and Buried Bunkers2026-04-24

3. Hidden Hypogeum and Lost Letters2026-05-01

4. Tunnels and Tombs2026-05-01

5. Labyrinths and Legends2026-05-08

6. Subterranean Secrets and Forgotten Foundations2026-05-08

7. Buried Battleship and Viking Victims2026-05-15

8. Bones Beneath and Coffins & Coins2026-05-15

9. Subterranean Seoul and Railway Revealed2026-05-22

10. Secret School and Concealed Castle Cemetery2026-05-22