What on Earth?
Season 4, Episode 18: Forbidden City of Inca Gold
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Treasure hunters have searched for a lost Incan city of untold wealth for a century, but new technology might finally locate its riches; a strange mountain in Egypt sparks an investigation into Cleopatra's gems and the tomb of Alexander the Great.
All Episodes - Season 4
Episode 1
Dracula's Tomb
Episode 2
Fountain of Youth Found?
Episode 3
Mafia Ghost Ship
Episode 4
Beasts of the Lost Jungle
Episode 5
Mystery of Fang Forest
Episode 6
Village of the Damned
Episode 7
The Minotaur's Lair
Episode 8
Lost City Of Goliath
Episode 9
Finding King Arthur
Episode 10
Treasures Of Valhalla
Episode 11
Hitler's Lost Gold
Episode 12
Temple of Blood
Episode 13
North Korea's Forbidden Islands
Episode 14
Cannibals in the Ghost City
Episode 15
Curse of Medusa
Episode 16
Nazi Stonehenge
Episode 17
Hunting the Ark of the Covenant
Episode 18
Forbidden City of Inca Gold
Episode 19
Ghost Ship of Hell Island
Episode 20
Mayan Armageddon: The New Evidence