What On Earth?

Strange mounds in Transylvania might pinpoint the location of the tomb of the bloodthirsty tyrant believed to have inspired Dracula. A mysterious ancient city is discovered on a coral reef. Images of a plane crash sets off a hunt for a drug lord.

A strange structure shaped like a giant shark might point the way to a lost civilisation's Fountain of Youth. A massive hurricane heads toward Florida but something unexpected is in its eye. Bizarre marks across the eastern US leave experts baffled.

A ghost ship with links to the mob suddenly appears on a California beach. Strange markings could be a coded message that reveals a plot to overthrow the Queen of England. A lake believed to have magical healing powers holds clues to life on Mars.

A ghost town covered in a strange, white power emerges from a lake in Argentina. Upon the discovery of a lost jungle in Africa, scientists embark on a dangerous mission to explore it. A declassified CIA image uncovers a bizarre, giant Soviet weapon.

A strange forest of razor-sharp stones could be home of an undiscovered Hobbit-like humanoid species. When a man-made island mysteriously appears off the US coast, grisly new evidence points to secret government experiments into psycho-chemical warfare.

A forbidden island points to a strange South American town that locals claim was the home of Adolf Hitler and a pit of bodies suggests fears of a zombie nightmare.

S4 E7 • 41m • HDU

When a labyrinth is discovered on an island once home to an ancient Greek civilization, experts investigate if it was the home of the Minotaur.

Bizarre underwater formations might point to a top-secret US weapons testing facility and a strange sighting in the Arctic could be a lost Nazi relic.

When a mysterious circular stone structure is discovered in Scotland, experts investigate whether it's the fabled Round Table of King Arthur.

When experts investigate a network of tunnels rumoured to be the hiding place of lost royal treasure, they find evidence of human sacrifice for the Viking god Odin.

S4 E11 • 41m • HDU

Evidence might finally identify the hiding place of the billion-dollar Nazi gold train and blood-red river in Siberia points to catastrophic pollution.

S4 E12 • 41m • HDU

An ancient man-made volcano might reveal bloody human sacrifice and a mystery in the Sahara might have a sinister explanation.

S4 E13 • 41m • HDU

Man-made islands are spotted near a Korean missile facility and when something unexpected is found in a desert, experts investigate a lost city of giants.

Adolf Hitler's secret UFO program Unknown, but ancient structure found in Eastern Ukraine, possibly created by the Arrata civilisation.

Experts investigate a strange glowing lake reported to turn things into stone. A mysterious structure in Africa that resembles Stonehenge is said to be the resting place of a mythical giant.

A mysterious Stonehenge-like structure in Russia might have links to the Nazis. Experts uncover clues to a mega-tsunami with the power to devastate the United States.

When a great white shark is killed, experts suspect a mysterious ocean monster and strange markings in the desert might be a tribute to an ancient spider god.

A strange mountain in Egypt sparks an investigation into Cleopatra's gems and the tomb of Alexander the Great.

A ghost ship is found abandoned on a remote island that's home to one of the world's last uncontacted tribes.

A strange structure shaped like a giant shark might point the way to a lost civilisation's Fountain of Youth.