Rudolf Hess never fully revealed the nature of his flight to Scotland. He stressed he went of his own volition until the day he died.

Although the United States is a relatively new country, it is rich in history. Here are some fascinating and famous mysteries from the U.S.

Where is Noah’s Ark? The world wide flood seems unlikely, given scientific evidence. But here are where they searched so far.

On 12 December 1910, heiress and socialite Dorothy Arnold vanished from the streets of New York City, never to be seen or heard from again.

No theory regarding the mummy in KV55 fits precisely. Queen Tiye can be ruled out, as can Kiya. Akhenaten and Smenkhkare are best candidates.

The last definite record of the tomb of Alexander the Great dates to roughly 215 AD, when Caracella visited the tomb. But where is it now?

An ancient Egyptian mystery that may have been answered, but often disputed, is how old is the Sphinx. There are conflicting opinions.

The dead man, who would later become known as “The man who never was,” was roughly 34 years of age, and used in “Operation Mincemeat.”