History's Greatest Mysteries

Hidden in the Nevada desert, a top-secret military base remains one of the most heavily restricted sites in the United States.

An investigation into the unshakable claims of a treasure hunter.

When the infant son of an aviation legend is snatched from his crib at home, it ignites a media firestorm; after a nationwide manhunt, the supposed culprit is brought to justice, but questions pop up on the investigation.

A 200-yard swath of debris landed near Roswell, New Mexico; some believe it was an alien craft, others that it was a secret government experiment.

In 1930, a New York Supreme Court justice with close ties to Tammany Hall, and future president Franklin Delano Roosevelt, steps out of a steakhouse and disappears; for decades, the case dominates mainstream media and remains unsolved.

The gruesome murder of a young beauty goes unsolved for decades; there's a long line of suspects, each more mysterious than the next.

A series of unexplained deaths near Chicago in 1982 starts a nationwide panic; the victims are connected by one frightening detail: cyanide-tainted capsules of Extra-Strength Tylenol; 40 years later, it remains an active FBI investigation.

For decades experts believe they know what caused the Hindenburg disaster: that leaking hydrogen--causing the airship to burst into flames; but there may be more to this story.

They've been called the world's greatest archaeological enigma: 2,000-year-old geoglyphs made in the Peruvian desert that span over 50 miles; the drawings are so massive, they can only be seen from the air.

A search into the extreme depths of the Bermuda Triangle, where five American torpedo bombers and the search plane dispatched to find them disappear without a trace in December 1945.

One of World War II's greatest unsolved mysteries: an incomparable work of art worth half a billion dollars, lost without a trace; perhaps the single most valuable object the Nazis ever stole, the quest for this treasure has lasted over 75 years.

Despite centuries of sightings and searches, one deep-sea monster remains unidentified; as evidence continues to mount, the mystery endures as to whether the Loch Ness monster exists.

During World War II, Japan plunders a fortune worth hundreds of billions of dollars from occupied countries, but to this day its whereabouts are unknown.

Awe-inspiring and mysterious, the pyramids of Egypt are significant wonders of the ancient world; more than 4,000 years old, they are celebrated architectural marvels, but no one fully understands how they were built or why.

The story of the most celebrated warrior king in history still stirs fascination more than 2000 years after his death.

It's history's most famous lost city; 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.

One of Germany's top military minds during WWII, General Erwin Rommel The Desert Fox, tears through North Africa.

A medieval manuscript, which is filled with unidentifiable drawings and written in a secret language so complex that even the world's best code breakers can't crack, it has obsessed everyone from scholars to conspiracy theorists.

A series of shocking murders shake the city of Boston to its core.

The death of one of history's most enigmatic rulers, Egypt's King Tutankhamun remains shrouded in mystery 3300 years later. Scientific advancements may be getting us closer to the identity of King Tut's killer.