Seasons and episodes
1
Season 1 April 24, 2026
-
1 - 1Underground Cities and Secret Chambers April 27, 2026 -
1 - 2Crystal Cathedrals and Buried Bunkers April 27, 2026 -
1 - 3Hidden Hypogeum and Lost Letters April 27, 2026 -
1 - 4Tunnels and Tombs April 27, 2026 -
1 - 5Labyrinths and Legends April 27, 2026 -
1 - 6Subterranean Secrets and Forgotten Foundations April 27, 2026 -
1 - 7Buried Battleship and Viking Victims April 27, 2026 -
1 - 8Bones Beneath and Coffins & Coins April 27, 2026 -
1 - 9Subterranean Seoul and Railway Revealed April 27, 2026 -
1 - 10Secret School and Concealed Castle Cemetery April 27, 2026
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.
Cast
Related Movies
