Witnesses share their stories of close encounters with the unknown, all under the scrutiny of a top microexpressions expert. From monsters and UFOs to paranormal phenomena, the country's most frightening tales are revealed.

Scientist Rob Nelson investigates the strangest underground locations in the world, using the latest technology and research to shed new light on the secrets that lie just beneath our feet.

Actress Megan Fox embarks on an epic international journey to investigate the most enduring mysteries of the ancient world.

Horror movie icon Robert Englund journeys into the darkest corners of America's past to uncover stories that are as terrifying as they are real.

In How the World Ends we look into some of the most noteworthy and notorious upcoming predictions of doom and take a closer look at their impending countdown to destruction.

Experts and eyewitnesses attempt to unlock the mystery of the Alaska Triangle, a remote area infamous for alien abductions, Bigfoot sightings, paranormal phenomena and vanishing airplanes.

Some of history’s greatest secrets are hidden in the world’s most treacherous corners. Now, two survivalists-turned wilderness-private-eyes are on a mission to solve mysteries in places that are inaccessible to the common man.

For the first time in history, an elite team of investigators use an advanced data algorithm to analyze five decades of Bigfoot sightings to pinpoint when and where to encounter the elusive beast. Armed with the results and state-of-the-art technology, they journey deep into the unforgiving Oregon wilderness to prove once and for all that Bigfoot is real.

After a spike in unusual emergency calls in Morgan City, Louisiana, the town’s mayor and his chief of police recruit a team of paranormal investigators to end the bizarre supernatural activity.

Demon hunter Tim Wood and his team investigate the darkest hauntings. The battle-tested crew employs unique scientific investigative methods and works closely with eyewitnesses to identify, communicate and confront the malevolent entities lurking in the shadows. Their ultimate goal is to better understand the evil intentions of these demonic and destructive forces.

Join the frightening hunt for the truth behind an infamous monsters that brings its legend to all-too-real life. Featuring new information. The latest evidence. Active investigations. Riveting eyewitness accounts of encounters with these nightmarish beasts.

Historian Justin Jampol unlocks the secrets of the past through recently unearthed artifacts. Using state-of-the-art scientific testing and good old-fashioned detective work, his investigations reveal new details about the most significant moments in history.

Don Wildman combs through the vaults of the world's most prestigious institutions to unearth extraordinary artifacts with captivating, revealing and shocking mysteries that challenge our beliefs and defy expectations.

Travel Channel takes you behind the gates of the world's most impressive castles, manor houses and mansions to discover the remarkable, mysterious and bizarre tales tied to the rich and powerful who once resided there.

The Spirit Hunters are a team of specialized paranormal experts who rescue the living from an endless and repetitive type of haunting known as a "ghost loop." At each haunted location, they build an emotionally charged trigger environment to lure the entity and break the terrifying cycle.

Investigative journalist Christof Putzel uses recently declassified documents to chase down new leads and clues into some of history's most notorious cold cases.