
History's Greatest Mysteries
In 1930, a New York Supreme Court justice with close ties to Tammany Hall disappears.

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.

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.