From ancient religious texts buried in Egypt to cultural relics found at sea, or even a tower of skulls hiding under the earth, these lost artifacts change what is known about certain sacred beliefs.

From a deadly discovery hiding under one of America's most loved national parks, to a Nazi era weapon sunk off the coast of New Jersey, you never know where a killer find is hiding or who may stumble upon it.

Two previous champions will face off in a gruelling 5-hour challenge, making a blade inspired by Hollywood for the chance to duke it out against one of our titans of the forge. Will either of these smiths have what it takes to Beat the Unbeaten?

For the first time in years, our top champions will step back into the arena, tasked with making the grueling Ginunting sword in just five hours, only one will be left standing to compete against J. Neilson, David Baker or Ben Abbott.

Satellite images reveal how El Chapo escaped from a high-security prison in Mexico and a giant black stain appears in a war-torn area of Iraq.

A giant letter Z is carved into a Mexican hillside, evoking the mark of a legendary outlaw. A strange sighting in Germany points to secrets from the Cold War.

An area of the US-Mexico border becomes an international mystery and ancient rock carvings in a remote mountain range depict unearthly beings.

An amateur archaeologist finds strange symbols scratched into the Kazakhstan desert and a lake in the Brazilian rain forest turns bright pink.

When terrorists kidnap more than 200 schoolgirls in northern Nigeria, rescuers use satellites to track them down.

From clandestine nuclear weapons programs to a secret Cold War bunker hidden in the mountains, or even World War 2 technology at the bottom of the sea, we explore the unlikely people, and surprising places behind the discoveries of the most top-secret information.

From ancient religious texts buried in Egypt to cultural relics found at sea, or even a tower of skulls hiding under the earth, these lost artifacts change what is known about certain sacred beliefs.

From a deadly discovery hiding under one of America's most loved national parks, to a Nazi era weapon sunk off the coast of New Jersey, you never know where a killer find is hiding or who may stumble upon it.

Two previous champions will face off in a gruelling 5-hour challenge, making a blade inspired by Hollywood for the chance to duke it out against one of our titans of the forge. Will either of these smiths have what it takes to Beat the Unbeaten?

For the first time in years, our top champions will step back into the arena, tasked with making the grueling Ginunting sword in just five hours, only one will be left standing to compete against J. Neilson, David Baker or Ben Abbott.

Satellite images reveal how El Chapo escaped from a high-security prison in Mexico and a giant black stain appears in a war-torn area of Iraq.

A giant letter Z is carved into a Mexican hillside, evoking the mark of a legendary outlaw. A strange sighting in Germany points to secrets from the Cold War.

Ancient Aliens

Dr. Jacques Vallee is best known for his revolutionary work in the field of UFOs, and his bold theories challenge our notions of alien life. Will his incredible work lead to answers about what has been happening in our skies for thousands of years?

Throughout ancient cultures there are stories of god-like beings providing instruction to early humans, helping our ancestors to establish the first civilizations and teaching them in various disciplines. Could it be true?

Beneath the sands of Egypt lie 24 enormous sarcophagi and every one of them is empty. What purpose might these giant tombs have served? And is it possible that the perfectly carved boxes were designed not by humans... but by otherworldly visitors?

Against all odds, Disney turns 27,000 acres of muddy Florida swampland into the world's largest and most visited Theme Park. It began in secret as "Project X," and when Walt Disney World finally opens it's a triumph of imagination and a dream.

Disney has pushed the boundaries of art and science through the work of a team, known as the Imagineers. This is the story of how, since their earliest days with Walt himself, Imagineers have turned the impossible into reality.

American Pickers

In Minnesota, Mike and Jersey go hog wild for a four-generation carny collection complete with carousel horses, toy tanks, and bumper cars. Down the road in New Hampshire, on a special mission for Robbie, the guys head to Roger's analogue laboratory.

American Pickers

On Chicago's North Side, Mike and Jersey get VIP access to a sprawling historic home that features four floors of dazzling high-end antique toys. And though collector Lou says he's ready to pare down his stock, striking a deal will take patience.

Mike meets a passionate Connecticut picker with major inventory but getting access to his collection means dismantling a massive, layered wall of stuff. Meanwhile, Robbie and Jersey comb through a California collector's old-timey General Store.

In a world without humans, water turns from life-giver to destroyer flooding cities, collapsing dams, and triggering ancient forces long kept at bay.

When humanity disappears, the global retail machine collapses—malls rot, shipping lanes turn explosive, and ghostly grocery stores become battlefields for rodents, predators, and time.

Ancient Aliens

Dr. Jacques Vallee is best known for his revolutionary work in the field of UFOs, and his bold theories challenge our notions of alien life. Will his incredible work lead to answers about what has been happening in our skies for thousands of years?

Throughout ancient cultures there are stories of god-like beings providing instruction to early humans, helping our ancestors to establish the first civilizations and teaching them in various disciplines. Could it be true?

Beneath the sands of Egypt lie 24 enormous sarcophagi and every one of them is empty. What purpose might these giant tombs have served? And is it possible that the perfectly carved boxes were designed not by humans... but by otherworldly visitors?

Against all odds, Disney turns 27,000 acres of muddy Florida swampland into the world's largest and most visited Theme Park. It began in secret as "Project X," and when Walt Disney World finally opens it's a triumph of imagination and a dream.