
History's Greatest Mysteries
In July 1996, one of the worst aviation disasters in American history leaves 230 people dead.

In July 1996, one of the worst aviation disasters in American history leaves 230 people dead.

The gruesome murder of a young beauty goes unsolved for decades; there's a long line of suspects.

A look at the Bermuda Triangle, where ships, planes and travelers have been lost without a trace.

Geoglyphs made in the Peruvian desert that span over 50 miles.

In 1930, a New York Supreme Court justice with close ties to Tammany Hall disappears.

Blackbeard is said to have had a treasure worth millions of dollars.

Thieves steal half a billion dollars in masterpieces from the Gardner Museum in Boston.

In July 1996, one of the worst aviation disasters in American history leaves 230 people dead.

The gruesome murder of a young beauty goes unsolved for decades; there's a long line of suspects.

A look at the Bermuda Triangle, where ships, planes and travelers have been lost without a trace.

Geoglyphs made in the Peruvian desert that span over 50 miles.

In 1930, a New York Supreme Court justice with close ties to Tammany Hall disappears.

Blackbeard is said to have had a treasure worth millions of dollars.

Counting down the top 10 alien craft, from V-shaped objects to orbs of light to flying saucers.

"Ancient Aliens" is counting down the world's top 10 mysterious islands, including homes to giants.

Disks found in a cave in China; an ancient Greek computer; a crystal skull unearthed in Mexico.

"Ancient Aliens" is counting down the world's top 10 pyramid sites, from Peru to Egypt.

Edgar Cayce, a modern-day prophet from the hills of Kentucky, becomes a worldwide sensation.

The ancient mysteries that exist on the islands of Malta could be connected to alien visitation.

Ancient texts indicate that Satan may have been an extraterrestrial who was more of an ally.