A surreal event outside a U.S. Air Force base near the Rendlesham Forest in England becomes an international legend, and one of history's strangest unidentified encounters. For more than 40 years, the question has endured: what was really out there in the Rendlesham Forest? What were the Rendlesham lights?

It's history's most famous lost city: Atlantis, the island kingdom that's baffled explorers for centuries. Some say Atlantis is a myth, while others insist it was a very real place wiped out thousands of years ago. Finding Atlantis would not only be the archaeological coup of this century, but perhaps for all time. Is Atlantis a real place, and if so, where could it be?