Deadly forests. Haunted houses. Mountains where visitors never return alive. Are there such things as evil places? And if so, is it possible these locations are imbued with dark energy that is currently beyond our understanding?

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?

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. Could these incredible creatures be real?

How was Devil's Tower formed? Why do some people get struck by lightning multiple times? While some may write these off as random occurrences, might they instead point to a new understanding of not only our planet's past but also its future?

Ancient practices such as prayer, voodoo and exorcism are often thought to be relics of bygone superstition, but there is evidence they have an impact on the physical world. Is it possible to use the power of ritual to tap into hidden forces?

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.

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?

How do some people live through the impossible? Whether it's plane crashes, bearing freezing temperatures or performing superhuman feats while in danger -- remarkable tales of human survival force us to reconsider what we know about our own will to live.

For more than 200 years, men have been coming to Oak Island in search of treasure that has so far eluded them, and has even cost them their lives. Could it be that, as legend suggests, the treasure is protected by a deadly curse?

Modern prophets. Catastrophic premonitions. Dreams of future crimes. Can people really predict the future? And if so, can we harness this knowledge to avoid the deadly events waiting in the days to come?

Abandoned cities. Ancient cultures nearly erased by time. And colossal empires that simply vanished without a trace. How does a civilization become lost? And what could cause once-thriving groups of people to just abandon their great cities?

Deadly dances. Masters of manipulation. Mass suicides. Many of the world's deadliest cults ventured down dark, dangerous rabbit holes of twisted ideologies, persuading their members to kill. Is there any sense to these sinister groups?

Our world is full of strange and mysterious weather phenomena that we still have no explanation for. Is it a result of just simple scientific anomalies, or could there be a stranger, more spiritual force at work?

Many have insisted that simple stones can do everything from choosing a king to causing death. So, what is it about rocks and stones that inspires some people to worship them?

Vampires and werewolves have lurked in our nightmares for centuries. But could these grotesque creatures of the night actually be real?

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