Secret School and Concealed Castle Cemetery yes Presented by National Geographic 2643.6 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-06-21T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/110/618bc3dbc5e3d7a987b55afd8fdfc0a2/579x325-Q100_618bc3dbc5e3d7a987b55afd8fdfc0a2.jpg History Documentary Hidden Beneath the Cities full Secret School and Concealed Castle Cemetery 1 10 https://abc.com/episode/c8f602e3-b212-4aaf-9efd-c1df45777787 Subterranean Seoul and Railway Revealed yes Presented by National Geographic 2643.6 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-06-21T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/109/770d05c6d7d37f2af2c2a4dba18367cd/579x325-Q100_770d05c6d7d37f2af2c2a4dba18367cd.jpg History Documentary Hidden Beneath the Cities full Subterranean Seoul and Railway Revealed 1 9 https://abc.com/episode/2f46826b-bc91-4b2f-83bb-82a7e195aabc Bones Beneath and Coffins and Coins yes A sealed tomb containing 12 skeletons; unearth a hoard of coins hidden during a Scottish massacre. 2643.56 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-06-14T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/108/cb6dd841c68b8c31dd6a16fa1711e556/579x325-Q100_cb6dd841c68b8c31dd6a16fa1711e556.jpg History Documentary Hidden Beneath the Cities full Bones Beneath and Coffins and Coins 1 8 https://abc.com/episode/152491e7-5513-4727-9f04-b51e19cd917c Buried Battleship and Viking Victims yes Presented by National Geographic 2643.6 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-06-14T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/107/e12b81af5e6f14720b9fddc0cb9ad521/579x325-Q100_e12b81af5e6f14720b9fddc0cb9ad521.jpg History Documentary Hidden Beneath the Cities full Buried Battleship and Viking Victims 1 7 https://abc.com/episode/ddc55912-d6bb-402c-8a80-5dd0bcd1b708 Subterranean Secrets and Forgotten Foundations yes Presented by National Geographic 2643.59 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-06-07T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/106/730d35ba822ce102a5ca376a89f83e60/579x325-Q100_730d35ba822ce102a5ca376a89f83e60.jpg History Documentary Hidden Beneath the Cities full Subterranean Secrets and Forgotten Foundations 1 6 https://abc.com/episode/faa28b5c-dd27-4f82-ad45-0bf3ea39a9dd Labyrinths and Legends yes Presented by National Geographic 2643.6 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-06-07T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/105/2833a37c7f0cbfb0f6c3cb4e159f0d80/579x325-Q100_2833a37c7f0cbfb0f6c3cb4e159f0d80.jpg History Documentary Hidden Beneath the Cities full Labyrinths and Legends 1 5 https://abc.com/episode/28dd555d-da94-4cff-8258-0e2490111468 Tunnels and Tombs yes Presented by National Geographic 2643.6 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-05-31T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/104/5c2245ec3299801aaab7933f6d83b7ce/579x325-Q100_5c2245ec3299801aaab7933f6d83b7ce.jpg History Documentary Hidden Beneath the Cities full Tunnels and Tombs 1 4 https://abc.com/episode/7d73854d-be2e-4321-b030-ffc472cf7b72 Hidden Hypogeum and Lost Letters yes Presented by National Geographic 2646.14 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-05-31T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/103/f24b186e43b28f8a625ba99ddbb1a049/579x325-Q100_f24b186e43b28f8a625ba99ddbb1a049.jpg History Documentary Hidden Beneath the Cities full Hidden Hypogeum and Lost Letters 1 3 https://abc.com/episode/0f68627a-4e1b-47da-89cf-109d156a9281 Crystal Cathedrals and Buried Bunkers yes Scientists uncover salt chambers, bunkers, old kingdoms, and mysterious caves. 2646.18 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-05-24T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/102/d7c8d90bf3e7f6e0a5fc081a1c2244de/579x325-Q100_d7c8d90bf3e7f6e0a5fc081a1c2244de.jpg History Documentary Hidden Beneath the Cities full Crystal Cathedrals and Buried Bunkers 1 2 https://abc.com/episode/aa9bd405-728a-4e8f-8608-f4069568e9fd Underground Cities and Secret Chambers yes Scientists uncover a city, a chamber, and a complex, and map a tunnel network. 2643.6 Hidden Beneath the Cities 2026-04-25T07:00:00+00:00 2026-05-24T06:59:00+00:00 https://cdn1.edgedatg.com/aws/v2/natgeo/HiddenBeneaththeCities/video/101/7e029a8d0bd110e20e080cce4f5f172f/579x325-Q100_7e029a8d0bd110e20e080cce4f5f172f.jpg History Documentary Hidden Beneath the Cities full Underground Cities and Secret Chambers 1 1 https://abc.com/episode/c6036fb9-a78a-4c89-ac17-3f8243d0b477