The UnXplained

Every year, people risk their lives to enter places the world has marked off-limits, and in most cases, no one fully understands why.

The world is full of stunning displays of natural phenomena that are so spectacular and, at times, so strange they defy conventional wisdom; examining if science can explain these mysteries.

Deadly forests, haunted houses, and mountains where visitors never return alive; a look at what constitutes an evil place and whether these locations are imbued with dark energy that is currently beyond understanding.

Throughout history and across the globe, there have been many sacred relics believed to be imbued with mystical powers.

Through records in historical texts, oral tradition and folklore, exploring how a once-thriving community becomes a lost city; what secrets found in the ruins reveal about human history.

Throughout history, humans have buried their dead in caves or chambers, in pyramids or in some form of a tomb; ancient tombs were visual memorials for the dead; in China, a vast necropolis was constructed as a way to connect to the afterlife.

From demonic possession and cursed homes to battlefield apparitions and ancient pacts with the Devil, history is filled with chilling accounts of supernatural forces said to be working against humanity.

To what extent have spies altered the course of world events, what tools do they utilize to carry out their missions, and how do these agents of deception hide in plain sight?

Millions of people around the world claim to have had an encounter with a creature unlike any recognized by mainstream science such as the Mothman, Chupacabra, and Mongolian Death Worm.

Bizarre, mysterious tales ran rampant and are still being told to this day; are these strange tales of the American frontier simply legend, or was the west far stranger than one could possibly imagine?

During The Golden Age of Piracy, thousands of buccaneers terrorized the high seas and became legends; their exploits spawned stories of larger-than-life characters, billion dollar heists, and buried treasure that to this day, has never been found.

According to the Greek philosopher Plato, the lost continent of Atlantis was once home to an advanced civilization before it was destroyed in a cataclysm; for centuries, archaeologists have tried to uncover evidence to prove that this legend is true.

Every year, thousands of people report looking up at the sky and witnessing unidentified flying objects; a vast majority of these strange incidents take place in the same locations on Earth.

All over the world, there are places and objects that are thought to be cursed; many people avoid these locations and things, believing they will bring harm, while others think that curses are nothing more than superstition and folklore.

Probing the Windsor Hum and Old Faithful; visiting a Venezuelan lake where lightning rains down 300 nights a year; sizing up the massive underground fire that's been burning in Centralia, Pa., since 1962.

Dracula, Lycaon of Arcadia, the Beast of Gévaudan; these are the names of grotesque monsters who have reared their terrifying heads throughout history, unearthly creatures that thrived on human blood and flesh.

Whether the ancients had scientific knowledge lost to time; how and why they fashioned remarkable feats of engineering.

A dog that can detect cancer faster than doctors can do it by using sophisticated equipment; a horse that can read minds; birds that can sense disaster days before it happens.

Ancient practices such as prayer, blood sports, voodoo and exorcism are often thought to be relics of bygone superstition but there is evidence they have an impact on the physical world.

A house that narrowly dodges the path of a tornado; rain that falls from the sky like blood; lightning that follows into the home.

A look at how some people live through the impossible such as plane crashes, freezing temperatures, or performing superhuman feats while in danger; remarkable tales of human survival force others to reconsider what is known about the will to live.

Throughout history, there have been men of science who pushed the boundaries of experimentation to the edge of madness.

As a new era of exploration of the Red Planet begins, the Red Planet's mysteries might be close to getting solved; ancient cataclysms are believed to have left Mars barren, but science continues to find clues that this red planet was once blue.

Examining mankind's fascination with the dead, from ancient civilizations to 20th-century empires, and the possible reasons for that focus.

A miraculous meteorite falling from the heavens and a chunk of sandstone considered so sacred that wars have been fought to protect it; throughout history, many have insisted that simple stones can do everything from choosing a king to causing death.

For thousands of years, people have believed in the existence of Satan, the embodiment of evil; some believe he has the power to possess souls and create mayhem amongst humanity.

From the ancient Babylonians to modern-day urban explorers, mankind has always been fascinated by abandoned places; discovering the allure that draws people to post-apocalyptic landscapes.

Sunken ships filled with priceless cargo; lost cities of gold; ancient temples concealing untold riches; there's something about these hidden treasures that captures the human imagination.

King Arthur, England's first pop culture superhero; his exploits inspired blockbuster movies and television series like ``Middle Earth``, ``Harry Potter``, ``Game of Thrones`` and ``Star Wars``; the significant impact of Arthurian legend on Western culture.

Whether it's called intuition, clairvoyance, or extrasensory perception, this elusive ``sixth sense`` defies explanation; can scientists find the secret to unlocking these remarkable gifts?