What on Earth? · S10 · E4
Hidden Fortress of Secrets
Satellites capture a castle-like structure hidden in Scottish woodlands.
About this episode
Satellites capture a castle-like structure hidden in Scottish woodlands.
Season 10
1Australia's Nuclear Desert
44 minOct 24, 2021
Satellite images capture a giant symbol mysteriously carved into the expanse of Australia's Great Victoria Desert; an investigation reveals a secret nuclear weapons-testing cover-up by the British government with numerous aboriginal casualties.
2Viking Warrior Invasion
44 minOct 31, 2021
Satellites capture bizarre circular structures in the forests of England.
3Mystery of Apache Mountain
44 minNov 7, 2021
Satellites capture mysterious stone objects across the Arizona mountains.
4Hidden Fortress of Secrets
44 minNov 14, 2021Now viewing
Satellites capture a castle-like structure hidden in Scottish woodlands.
5Code of the Viking Witch
44 minNov 21, 2021
Satellites capture rocks in the shape of a fingerprint on a Swedish island.
6Mystery of the Cursed Forest
44 minNov 28, 2021
Satellites capture a bizarre pattern of circles in a remote English forest.
7Secrets of the Roman Occult
44 minDec 5, 2021
Aerial imaging captures a complex of ancient Roman buildings in Yorkshire.
8Legend of Moonshine Forest
44 minDec 12, 2021
Satellites capture a gigantic oval carved into the forests of New Jersey.
9Nuclear Ghost Towns
44 minDec 19, 2021
Satellites capture a mysterious collection of ghost towns in Belarus.
10Lair of the Living God
44 minDec 19, 2021
Satellites capture a cone-like structure in the mountains of Turkey.