History's Greatest Mysteries

In 1587, a group of settlers land off the coast of North Carolina on Roanoke Island to establish the first English Colony in America. But only a few years later, the 115 men, women and children seemingly vanish without a trace, leaving only cryptic clues.

In 1997, thousands of people across Phoenix witness a series of strange lights unlike anything they've ever seen. Could this be one of the largest-scale UFO sightings in history, or is there another explanation for this mysterious phenomenon?

One of the holiest and most powerful relics from the Bible has been missing for over 2,000 years. While some believe the Ark of the Covenant was destroyed, many people think it's still out there.

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. But could a deathbed confession finally tell us what happened to Judge Joseph Crater?

One of history's most notorious pirates, Blackbeard, is said to have had a treasure worth millions of dollars. After centuries of searching, the legendary hoard remains missing.

An ancient mechanical device found on a 2,000-year-old shipwreck has become known as the world's first computer. The machine is centuries more advanced than historians thought possible, but its origin and true purpose are shrouded in secrecy.

Awe-inspiring and mysterious, the pyramids of Egypt are among the most significant wonders of the ancient world. But no one fully understands how they were built, or why.

During World War Two, the Nazis stole vast amounts of art, gold, silver and currency, and stashed it across Europe. While some of the plunder has been recovered, much more is still missing nearly 80 years later.

For centuries, this 500,000 square mile area of the Atlantic has been the most notorious stretch of ocean on Earth. It's a place where ships, planes, and unsuspecting travelers have been lost, without a trace.

It's one of the most famous stories from the Bible: God sends a flood to wipe out nearly every living thing on Earth, except for Noah, his family and the animals he saves in his fabled ark. Can scientific evidence prove if there really was a great flood?

It's the only unsolved air piracy case in history. In 1971, a man hijacks a Northwest Orient Airlines flight, demanding 4 parachutes and $200,000. Can new evidence finally reveal the identity of the anonymous hijacker known as D.B. Cooper?

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?

It's one of the most famous prehistoric monuments on Earth. A mysterious arrangement of stones that have adorned the English countryside for millennia. But to this day, nobody knows how the landmark was built or why.

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?

In 2016 a mysterious illness strikes dozens of government officials in Cuba. Over the next few years, hundreds more are afflicted. What is the true cause of the strange phenomenon known as "Havana Syndrome?"

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. What is the true purpose of the incredible Nazca Lines?

She was the last pharaoh of Egypt and one of the most famous queens of all time, but her death in 31 B.C. has been shrouded in mystery. Cleopatra's body and final resting place have been lost without a trace for over 2,000 years.

In July 1996, one of the worst aviation disasters in American history leaves 230 people dead and countless questions unanswered. It's a tragedy that changes the aviation industry forever, but what caused the explosion of TWA Flight 800?

The history books say Adolf Hitler committed suicide in the final days of World War II, but not everyone believes there's sufficient proof.

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.

It's one of the most infamous crimes in American history: the gruesome murder of a young beauty, unsolved for decades.

In a perfectly planned robbery, thieves steal half a billion dollars in masterpieces from the Gardner Museum in Boston. Who orchestrated the biggest art heist in history--and why?