Hidden Beneath the Cities - Full Series Information, Trailer & IMDb Reviews
Hidden Beneath the Cities Season 1 Episode 3
Episode Title: Hidden Hypogeum and Lost Letters
Countries:
United States,
Airing Date: April 27, 2026
IMDb Rating:
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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 centres, from the tombs and wartime shelters of Naples to the manmade Royston Cave in Hertfordshire, England.