Images of earth from space reveal an intimate portrait of human activity. Cities glow bright while the wilderness remains dark. Why then is the Australian outback, lit up like a series of vast cities?

Desperate signs from lost veterans in Vietnam captured by satellite. A fleet of massive ships stranded in the middle of a vast desert. Strange walls stretching vast distances across Northern California. Just what on earth are they?

Satellites discover American stealth technology deep inside China. An unidentified cloud swamps America’s skis. And something truly massive is lurking beneath Loch Ness. Just what on earth are they?

Satellites spot strange spiral markings in the remote African desert. A weird deadly black blob is threatening the Florida Keys. Something massive found deep beneath the ice of Antarctica. Just what on earth are they?

A satellite spots a set of huge arrows in the badlands of the American west. A blood red waterfall stains Antarctica’s snows. A plague of huge holes in the Siberian landscape. Just what on earth are they?

The face of Christ is found in a field in Hungary. A photo that claims to show who shot down a passenger jet in Ukraine. A sinister shape in the mountains of Afghanistan that leads investigators to a hidden genocide.

A strange structure is found in Mongolia. Is it the lost tomb of Genghis Khan? Bizarre rings in Spain could lead to the lost city of Atlantis. A huge island is on a collision course with New Zealand. What on earth are they?

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

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

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

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.

A buried monument offers new evidence about one of the Bible's greatest mysteries. A giant shadow engulfs the Pacific Ocean. Scientists can't explain a lake that's shaped like a perfect circle, and is home to otherworldly life.

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

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