Thousands of people swear they've encountered this legendary North American creature, but Bigfoot has never been officially identified. As evidence continues to mount, and photos are scrutinized, the mystery endures: does Bigfoot really exist? And if so, what is it--and where is it?

It is a legendary ancient city, said to be overflowing with gold. For centuries, explorers put their lives on the line searching for it. As the endless quest to uncover this infamous city continues, will anyone ever find it?