Explanations and history behind the alleged existence of vampires.

Explore the mystery of the Ark of the Covenant, in which Moses is said to have placed the two tablets of stone on which God inscribed the Ten Commandments.

Scholars examine the archaeological evidence suggesting a factual basis for Homer's classic "Iliad.".

Were King Arthur and his Knights of the Round Table fictional characters or real people? This fascinating hour takes viewers on a magical quest through England and Wales in search of clues.

Search for evidence that Norsemen discovered the New World 500 years before Christopher Columbus, trace the explorations of Leif Ericson, and examine clues about the Vikings' travels.

Originally built by the Incas, this magnificent structure remains a mystery. Was it an observatory? Pleasure retreat? Fortress?