Hidden Beneath the Cities · SEASON 1

Subterranean Seoul and Railway Revealed

Episode 9 · 2026-05-22

★ N/A
← Previous episode All seasons Next episode →
Hidden Beneath the Cities poster
Season 1Episode 9★ N/A/10
  • Documentary

Episode overview

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.

45 minutes

Season 1 episodes

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