She was the last pharaoh of Egypt and one of the most famous queens of all time, but her death has been shrouded in mystery. Cleopatra's tomb have been lost for over 2,000 years. Can new evidence uncover Cleopatra's missing tomb?

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. Did the Nazi leader really die in Berlin, or was he able to escape?

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.

In a perfectly planned robbery, thieves steal half a billion dollars in masterpieces from the Gardner Museum in Boston. It's been three-decades since the brazen heist... Who orchestrated history's biggest art heist - and why?

The haunting image of the Shroud of Turin has captivated millions around the world. But what exactly is it that we are seeing, and how did it come to be? Is the Shroud of Turin truly an image of Jesus? Or something very different?

In 1698, Captain William Kidd raids a ship on the high seas and seizes its vast treasure... but Kidd is hanged before revealing where he stashed the loot. What happened to Captain Kidd's lost booty... and where is it now?

A perfectly masterminded plot leads to the most brazen prison break in American history. The search for the infamous Alcatraz escapees continues to this day. But is it really possible they survived--and if so, where did they go?

On February 24, 1942, military radar picks up what appears to be enemy aircraft over Los Angeles. Sirens send citizens scrambling, as troops fire artillery at the illusive targets. What exactly triggered the so-called Battle of Los Angeles?

With 500-year-old secrets, hidden in skeletons and stone, Machu Picchu is one of the most puzzling archaeological sites on earth. It's among the ancient world's most enduring riddles: Who built this astonishing complex, and why?

The death of one of history's most enigmatic rulers--Egypt's King Tutankhamun--remains shrouded in mystery 3300 years later. No one knows what ended the young pharaoh's life, but scientific advancements may be getting us closer to the answer.

Experts believed they knew what caused the Hindenburg disaster, but there may be more to this story. Whatever triggered the explosion, it didn't just spell doom for the Hindenburg but for the entire rigid airship industry.