When a perfect triangle is found in the middle of a unpopulated portion of Australia, experts begin to wonder whether or not the design is man made.

Satellite photos show a strange circle beneath the ice of an ancient lake. Further analysis shows that these mysterious rings appear each year. What are they?

A satellite captures an image that uncovers the entrance to an underground complex. What is being built there?

Scientists are baffled when a seemingly huge tsunami headed straight for Hong Kong suddenly disappears in the water.

Sandy Island seems to have disappeared, and scientists aren't quite sure why. Was there some sort of elaborate government experiment?

Satellite images capture a distinct glowing object beneath the ocean's surface.

Satellite images reveal a strange hole in Antarctica. After scientists rule out whirlpools and sinkholes, they have to look back in time to find the answer.

A commercial satellite imager spots something strange in the middle of a vast desert. It looks like an airport runway, but there are no planes. No government claims ownership of this strange place.

Satellite images reveal enormous spirals in Peru. Some researchers say they are too perfect and too huge to be man made.

Ghost lakes have existed for millions of years, but they just recently started showing themselves. Geophysicist Helen Fricker explains how scientists are moving forward with this discovery.

For years the hottest place on Earth ever recorded was a city in Libya. When researchers took a second look at this information, they realized the measurement was wrong.

When you think of deserts, you don't typically think of bright, jewel tones. Why are these massive pools of color here?

Who drew this over 2 mile long humanoid figure into the Australian terrain?

Satellite images revealed hundreds of black holes in the middle of the desert near ancient burial grounds. Is grave robbing still a thing in modern day or were these holes caused by something else?

Satellites spotted a strange, long streak across the desert in Bolivia. At first, scientists thought it may be a skid mark from a meteor.

This isn’t an optical illusion. This lake on Middle Island is actually pink! You can thank the algae in the lake for the gorgeous color.

This isn’t an optical illusion. This lake on Middle Island is actually pink! You can thank the algae in the lake for the gorgeous color.

A lightning bolt scars the Australian outback.

Meteorologists were stunned when a strange storm became randomly enormous. Turns out it wasn’t a storm.

If it's not a whirlpool, what is it? It's 100 miles long!

An eerie green vortex of death swirls in the Baltic sea.

Nicknamed The Wheel of Giants, this gigantic stone pattern baffled archaeologists. There are conflicting theories as to what it was used for.

At the height of the cold war, the CIA is confounded by a powerful new weapon dubbed the Caspian Sea Monster.

A deadly plague eats away at a Rhode Island forest.

Lake Loughareema was there one moment, and gone the next. This mystery is still unsolved.

Experts investigate an eye shaped lake containing a mysterious floating island.

In 2010, a satellite above Russia spots 108 perfectly formed, varying sized circles on ice. What On Earth are they?

Experts question the purpose of an artificially created island constructed by the military.

In particularly cold areas, freak atmospheric conditions can create perfect circles of ice. They’re absolutely stunning!

New data from NASA satellites reveal a sunken lost continent in the Indian Ocean.

Tourists and explorers have reported magnetic interferences with their compasses and electronics around Lake Lonar

You can thank a meteorite that crashed into Earth thousands of years ago.