What on Earth?

Satellite images capture two conjoined circular structures embedded in the lush and rolling landscape of Ireland; experts investigate and uncover an ancient site linked to legendary figures and the elusive hunt for the Ark of the Covenant.

Satellite images capture a triangular castle-like tower located on the Mediterranean island of Sardinia; experts investigate the relics of a declining ancient civilization that may have suffered a celestial catastrophe.

Satellites capture ruins amid bizarre structures on a Welsh mountaintop.

Satellites capture bizarre structures on the Greek island of Kefalonia.

Satellites capture dozens of parallel lines hidden in Polish woodlands.

Satellites capture a bizarre industrial complex in desert of Kazakhstan.

Aerial imaging captures a complex of ancient Roman buildings in Yorkshire.

Satellites capture a bizarre pattern of circles in a remote English forest.

Satellites capture rocks in the shape of a fingerprint on a Swedish island.

Satellites capture a castle-like structure hidden in Scottish woodlands.

Satellites capture mysterious stone objects across the Arizona mountains.

Satellites capture bizarre circular structures in the forests of England.

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.

Experts uncover a gravesite with the remains of possible vampire burials.

Images reveal a forgotten war-torn fortress in the swamplands of Louisiana.

New evidence reveals a Viking portal to their spiritual realm.

Images reveal an alien substance in the land of the Aztecs.

Satellite images capture a mysterious building on Jeffrey Epstein’s island.

Experts follow evidence of a Nazi base in the Amazons to a dark discovery.

The remains of an abandoned settlement high in the mountains of Peru could be an ancient Roman village, leaving experts to speculate if the Romans visited the Americas centuries before Columbus; if so, it could point to long-lost gold.

Experts suspect a lost pyramid in China could be a secret military base.

Satellite images capture a volcanic island that suddenly appears in the Pacific Ocean, and when NASA scientists arrive to investigate, they are baffled to find it's home to a primordial slime and zombie creatures with origins in outer space.

Crop circles spotted on an island in the Mediterranean might not be from aliens, but from a threat closer to home: Nazis; new discoveries help experts uncover who made them and for what sinister purpose.

Satellite images capture evidence of an abandoned town hidden in the American wilderness, and as experts analyze this new evidence, they reveal what this strange place has to do with a top-secret military plan to battle an army of the undead.

When satellites discover a strange abandoned city frozen in time, experts investigate what caused the people who lived here to disappear overnight; using cutting-edge tech, they follow fresh leads to uncover if this mysterious city has a dark secret.

When satellites spot anomalies in the unexplored Amazonian jungle, experts wonder if they've discovered relics of a lost civilization; an on-the-ground investigation reveals a dark truth that's more sinister than ever imagined.

When the people of a thriving Midwestern town suddenly disappear, they leave behind an eerie ghost town with a dark secret; experts use cutting-edge tech to investigate if the mysterious exodus could be evidence of a freak natural disaster.

When an island off the coast of Mexico suddenly disappears, government officials scramble to find an explanation; cutting-edge technology might reveal if the strange place was destroyed by a foreign power or if it existed at all.

When strange circles of reindeer appear in the remote tundra of Sweden, experts investigate if this mysterious event could be evidence of fatal aftershocks from the Chernobyl nuclear disaster.

When instruments on the International Space Station suddenly malfunction every time it passes over a mysterious site in the Atlantic Ocean, experts investigate if this eerie behavior is more than just a tech glitch, but a prophecy of global doomsday.

When mysterious structures are discovered deep in a remote forest, experts investigate if this strange site was the long-lost birthplace of a top-secret Nazi project that produced some of the deadliest weapons the world had ever seen.

When a sinister cave is discovered in a remote corner of Iceland, experts uncover a secret underworld tunneling to unknown depths, and using cutting-edge tech, they investigate if this strange place could hold secrets of alien worlds.

When a strange pattern appears in a field, experts wonder if its an extraterrestrial response to a message sent to an alien star cluster in 1974, and using cutting-edge science, they uncover its true origin.

When satellites spot a mysterious structure in North Korea, experts investigate if this sinister evidence points to a looming nuclear threat, and using cutting-edge tech, they reveal dark secrets from this strange place.

An abandoned ghost town in a remote desert with a dark past. When a strange facility is spotted in Russia, experts investigate if it's hiding evidence of alien life. Cutting-edge tech reveals new clues to these sinister mysteries from space.

The world's most dangerous threats are in top-secret locations all over the planet, and using cutting-edge technology, experts reveal the truth behind these sinister mysteries from space.

New discoveries from space give experts new clues in the hunt for Jack the Ripper; a strange object crash-lands in Antarctica, experts speculate it could be an alien visitor.

A fleet of sunken ships that point to ghosts, cannibals, and bloodshed in early America; strange arctic holes that NASA can't explain; near Area 51, mysterious alien structures straight out of Star Wars.

Zombie reindeer haunting the mountains of Norway. Strange circles in the sand by a secret US military base. A gigantic streak in the Arctic pointing towards alien life. Cutting-edge technology helps experts answer these sinister mysteries from space.

A satanic symbol that points to an army of the dead in Siberia; a massive stone giant in a remote desert; evidence of a Russian doomsday device right on America's doorstep; cutting-edge technology helps experts answer sinister mysteries from space.

Alien monoliths haunt the coast of England; an obliterated jungle points to an brutal narco gold rush; evidence of a strange blood-red creature emerging from the deep.

Something strange in the Himalayas could be evidence of a top-secret CIA program to turn monks into killer agents; cutting-edge science helps experts investigate the truth behind the mysterious anomaly.

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. A huge lake appears in the Sahara overnight, and its explanation could be mythical.

Experts investigate a 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 dark conspiracy could be at work in the Australian outback.

An abandoned city in the African jungle might have a bloody past of malevolent spirits and cannibals. Mount Vesuvius shows signs that it's awakening, and the mafia could be to blame. Experts investigate Hitler's secret Nazi UFO program.

Man-made islands are spotted near a North Korean missile facility. When something unexpected is found in a remote desert, experts investigate a lost city of giants. A strange discovery in Siberia could reveal a mission to the center of the earth.

An ancient man-made volcano might reveal buried treasure and bloody human sacrifice. When NASA discovers a strange pattern in the Arctic ice, experts investigate if it has alien origins. A mystery in the Sahara might have a sinister explanation.

New evidence might finally identify the hiding place of the billion-dollar Nazi gold train; a discovery of a long-lost settlement rewrites the history of the Vikings in North America; a blood-red river in Siberia points to catastrophic pollution.

Evidence of human sacrifice for the Viking god Odin; shedding new light on Genghis Khan.

An abandoned megacity in a remote jungle might be the home of an ancient treasure and a dark secret; when a mysterious circular stone structure is discovered in Scotland, experts investigate whether it's the fabled Round Table of King Arthur.

A lost city near Jerusalem might have been the home of Goliath; bizarre underwater formations might point to a top-secret US weapons testing facility; a strange sighting in the Arctic could be a lost Nazi relic.

A strange lake in Transylvania is the home of an abandoned village and a terrifying secret. When an labyrinth is discovered on an island once home to an ancient Greek civilization, experts investigate if it was the legendary home of the Minotaur.

A forbidden island points to a strange South American town that locals claim was the home of Adolf Hitler. New data from NASA satellites might reveal a sunken lost continent in the Indian Ocean. A pit of bodies suggests fears of a zombie nightmare.

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

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 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 strange structure shaped like a giant shark might point the way to a lost civilization'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.

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 massive chasm in a Siberian forest may be a gate to the underworld.

New evidence could lead to the discovery of an ancient civilization.

A vast structure near the legendary city of Petra points to a bloody past.

An amateur archaeologist stumbles open strange symbols scratched into the Kazakhstan Desert; CIA surveillance photographs show what looks like a giant Star of David on the island of Cuba; and a lake in the Brazilian rain forest that turned bright pink.

A strange mass breaches surface of an ocean near Antarctica, sparking rumors of a mythological sea monster. An area of the US-Mexico border becomes an international mystery. Ancient rock carvings depict weird, unearthly beings.

A giant letter Z is carved into a Mexican hillside, evoking the mark of a legendary outlaw. A strange sighting in Germany points to secrets from the Cold War. Massive, blood-red marks in China prompt fears of a violent government crackdown.

Satellite images reveal how El Chapo escaped from a high security prison in Mexico. Mysterious patterns in the Australian outback and the Kalahari Desert spark a major scientific investigation. A giant black stain appears in a war-torn area of Iraq.

A sinister giant swastika appears in a forest in Germany. A strange pattern is etched into the desert near the famous Nazca lines, but archaeologists don't know who put it there. Mysterious markings are spotted in an isolated corner of Antarctica.

A heavily armored force takes over one of Syria's most ancient archaeology sites, prompting fears that its relics are being stolen. Tanks appear to be facing off in Antarctica next to an unworldly object. A water reservoir in LA suddenly turns black.

A dagger sealed in King Tut's tomb for more than 3,000 years is made of a metal that seems to have extraterrestrial origins. A massive swastika is found in the desert near Roswell, NM. Satellites hunt for the world's most wanted man, Joseph Kony.

A buried monument offers new evidence about one of the Bible's greatest mysteries. A giant shadow engulfs the Pacific Ocean. Scientists have trouble explaining a strange lake that's shaped like a perfect circle, and is home to otherworldly life.

Investigators find a new clue about the missing Malaysia Airlines flight that disappeared in 2014. An astronaut spots something strange in the Sahara Desert. A mysterious orange sludge invades a remote village in Alaska.

Legends of ancient giants surround a mysterious monument in the Holy Land. A bright pink lake could point to a strange, undiscovered new species. When a young boy disappears in a sand dune, satellite images help with the investigation.

Strange black holes appear near Egypt's ancient pyramids, and new evidence points to a disturbing conclusion. Ruins in Peru suggests that the Inca people knew far more than previously thought. A mysterious red swarm invades a beach in India.

A giant carving of a strange creature suddenly appears in the Australian Outback. Mysterious bright green lights illuminate the seas around Thailand. Top secret activity is discovered at Iran's nuclear facility.

Strange spots near the Grand Canyon may hold clues to the legendary treasure of a notorious bandit. Satellite images could explain desert ruins rumored to be an entrance to an underworld. A city-size chunk of ice suddenly disappears in Antarctica.

A collection of military mysteries; Satellites find stealth technology deep in China; Signs of MIA's in Vietnam, Strange smoke clouds over North Korea, Strange mountain fortress in Russia.

Satellites find a great scar in the desert, it might be the key to finding the last wonder of the ancient world; Clues to the location of infamous City of Gold, El Dorado.

A US spy satellite may have sumbled upon Noah's Ark; NASA may have found the Garden Of Eden; possible evidence of the destroyed city of Sodom.

We investigate one natural phenomenon, four shapes that look like being of human origin, and monitor one example of human origin and current destruction.

We investigate two examples of men at war, and two engaging with water, but another vision is in the eyes of the beholders, and the last phenomenon is a severe natural event.

We investigate two examples of human activity in the U.S.A., one in Africa and one in Asia, with two natural phenomena where ice is a major factor.

Major natural anomalies and varied human activities are investigated.

Five discoveries are probably related to potential warfare and one possibly to wildlife.

Evidence of human activity is found in strange times and places, and a new perspective on a biological activity known since the nineteenth century.

Weird barren rings in the Namib Desert, an island the size of Manhattan that vanishes without trace and a lost city in the heart of the Amazonian jungle. What on Earth? Investigates six more mysteries captured from space.

A massive tsunami hundreds of feet high that never touches land; a secret underground base in China; an image from space may have revealed the location of the Garden of Eden.

American stealth technology inside China; apparent signs from lost veterans in Vietnam; a blood-red lake in Iraq.

Possible clues to the location of El Dorado, the legendary city of gold, are studied.

A possible sighting of Noah's Ark; the face of Jesus in a Hungarian field; and God's wrath captured in action.