
History's Greatest Mysteries
The pyramids of Egypt are wonders of the ancient world, more than 4,000 years old.

The pyramids of Egypt are wonders of the ancient world, more than 4,000 years old.

As evidence continues to mount, the mystery endures as to whether the Loch Ness monster exists.

An ancient mechanical device found on a 2000-year-old shipwreck.

In 1997, thousands of people in Phoenix witnessed strange lights; this could be an UFO sighting.

In 1587, a group of settlers land off the coast of North Carolina on Roanoke Island.

In 1963, JFK is assassinated; a suspect is captured, but many believe there's more to the story.

New evidence and technology may be able to crack the code and discover who the Zodiac Killer is.

The pyramids of Egypt are wonders of the ancient world, more than 4,000 years old.

As evidence continues to mount, the mystery endures as to whether the Loch Ness monster exists.

An ancient mechanical device found on a 2000-year-old shipwreck.

In 1997, thousands of people in Phoenix witnessed strange lights; this could be an UFO sighting.

In 1587, a group of settlers land off the coast of North Carolina on Roanoke Island.

A multitude of guests and scientists explores the latest conceptions of the cosmos.

Mysterious symbol of the keyhole exists in mystic texts, sacred architecture and ancient artwork.

According to the earliest Tibetan traditions, Shambhala is hidden high in the Himalaya Mountains.

Examining the possiblility that The Book of Enoch documented humanity's extraterrestrial origins.

Strange ancient objects could suggest that an extraterrestrial civilization once existed on Earth.

Ancient cultures recorded stories of enormous beings that descended from the sky.

A multitude of guests and scientists explores the latest conceptions of the cosmos.

Mysterious symbol of the keyhole exists in mystic texts, sacred architecture and ancient artwork.