During The Golden Age of Piracy, thousands of buccaneers terrorized the high seas and became legends. Their exploits spawned fantastic stories of larger-than-life characters, billion dollar heists and buried treasure that to this day, has never been found. Are these stories simply tall tales, or is the truth stranger than fiction?

People go missing every day, but throughout history, there have been strange and eerie disappearances that continue to capture the world's attention. Whether it's the missing case of a world famous icon, like Amelia Earhart, or even entire groups of people that seem to vanish without a trace, these mysterious disappearances have spawned countless theories, but no definitive answers.

There are stories of advanced technology, from the ancient past, that seem too impossible to be true. Some are spoken of in legends and myths, while others can be seen today with the naked eye. These technologies challenge everything we think we know about the innovation of our ancestors. Is our most cutting-edge modern technology, merely reinventions of those that existed thousands of years ago? And if it is, where did these incredible lost inventions go?

There are islands throughout the world that despite their scenic and tranquil beauty, evoke nothing but fear and dread. These islands are riddled with dark histories, unspeakable tragedy, and the belief by locals that they are cursed. Are the misfortunes experienced by the inhabitants of these islands simply a series of tragic coincidences, or is it possible that scattered across the planet there are... Islands of the Damned?

Many mysteries of planet Earth are far from understood. How was Devil’s Tower formed? Or why do some people get struck by lightning multiple times? While some may write off these as random occurrences, might they instead point to a new understanding of not only our planet’s past – but also its future?

Perhaps the greatest unexplained mystery of all is: what happens to us after we die? Perhaps clues to the answer lie in unusual cases of near-death experience, reincarnation, and how memories can be passed from organ donors to transplant recipients. Are these phenomena figments of our collective imagination, or could they be real?

Even after centuries of study, the human mind remains as inscrutable as ever. Could the quintessential human machine, the brain, be even more powerful than we realize? And does that suggest that fantastic abilities such as Remote Viewing will one day be recognized not as science fiction, but as science fact--even if, for the moment, they remain UnXplained?

A house that narrowly dodges the path of a tornado. Rain that falls from the sky like blood. And lightning that follows you...into your home.

A dog that can detect cancer faster than doctors using sophisticated equipment. A horse that can read your mind. And birds that can sense disaster days before it happens. What gives animals these extraordinary powers? We like to think of ourselves as the peak of evolution--but what if we're wrong?

Ancient ruins fascinate us, and some archaeological finds are so baffling that they challenge everything we know about the past. Will we ever learn the truth about these mysterious ruins? Or will they continue to present more questions than answers?

Genius is widely considered to be the ability to change the world in an incredible way: inventing new technology, deciphering the mysteries of the universe, or creating transcendent art. But where does genius come from? What is the X-factor that makes someone a genius? Is it "good genes"? A proper education? Or do geniuses tap into something much more mysterious and extraordinary?

More than 80% of the Earth's oceans remain unexplored, and in many ways, the underwater world is the final frontier. As new technology allows us to explore oceans and deep lakes more than ever before, what will we find? Will we discover profound secrets about the oceans? Underwater ruins that were lost for thousands of years? Or perhaps something even more extraordinary?

From the ancient Babylonian's to modern day urban explorers, mankind has always been fascinated by abandoned places. What is the allure that draws us to these post-apocalyptic landscapes? Is it simply morbid curiosity? Or, something harder to define? Could abandoned places actually be places of 'magic'--as the ancients believed? Well, that is what we will try and find out.

A look at whether time travel has already occurred, on purpose or by accident, and scientists who believe it is theoretically possible.

During the Middle Ages, the Vikings were infamous for being a bloodthirsty band of seafaring warriors; historians are learning surprising new things about this Norse society.

Since the dawn of humanity, tales of monstrous creatures lurking in the shadows of our world have sparked both fascination and fear. Today, we often dismiss these accounts as the stuff of myth and legend, but are we overlooking a potentially terrifying reality? With scientists discovering as many as 18,000 new animal species every year, isn't it conceivable that there could be real-life, flesh and blood monsters living among us?

Humanity has launched satellites into outer space and submarines to the ocean floor, but the ground below Earth's surface remains shrouded in mystery. Are there profound secrets buried beneath layers of rock, or hidden in vast caves? Can the subterranean world below shed light on humanity's past, or even its future?

Throughout the world, there are ancient structures that defy explanation because even with today's technology they would be nearly impossible to duplicate. How were ancient civilizations able to build such extraordinary structures? And what purpose did they serve?

For centuries, archaeologists have tried to unravel the mysteries of how – and why – certain incredible structures like the Great Pyramid at Giza, the staircase at Loretto Chapel, and Coral Castle were built. Will we ever find the answers? Or, might these structures have been intentionally constructed to perpetually mystify us?

For decades, the debate has raged as to what exactly Unidentified Flying Objects--or "UFOs"--really are. Theories have been put forth that attribute them to everything from secret military aircraft to weather phenomena and more. But by far, the most controversial theory is that these objects are, in fact, spacecraft that have been piloted to Earth by extraterrestrial beings. It's a seemingly outlandish notion, but could it be true? And if so, how much does the government know about these spacecraft--and the aliens who are visiting our planet?

For centuries, humanity has looked up at the Moon with a sense of wonder. But is the Moon just a rock floating in space? Or could it hold profound secrets—and perhaps even possess incredible powers? That is what we will try and find out.

Scattered across the globe lie mysterious ruins that are buried in sand-swept deserts, perched atop towering mountains, and shrouded in the heart of dense jungles. These age-old structures stand as silent sentinels from the past, their true history seemingly erased by time. Can modern archaeology unravel the enigma of how-and why-these wonders were built?

There are many bizarre tales involving U.S. presidents that defy explanation and are still shrouded in mystery.

Throughout history, tales of inexplicable maladies to both the body, and the mind, have stirred morbid curiosity and palpable fear. From mysterious wounds that appear for no apparent reason--to a peculiar madness that compels people to dance themselves to death. Are these bizarre afflictions merely fabrications of the mind? Or could they arise from unseen forces that are beyond our comprehension?

There's nothing more fascinating than a code that can't be cracked. For centuries, mankind has devised ingenious ways to hide valuable information using everything from enigmatic puzzles, to complex ciphers and secret symbols. If history's unbreakable codes can be deciphered, could we unlock answers to some of the greatest mysteries of both the past and present?