Portal to the Underworld

Antiques Roadshow is a British television show in which antiques appraisers travel to various regions of the United Kingdom to appraise antiques brought in by local people. It has been running since 1979. There are also international versions of the programme.

Reenactments of alien encounters.

A chilling series in which survivors of a paranormal experience relive their harrowing encounter.

Over the past four and a half decades, the so-called D.B. Cooper skyjacking case has captivated countless armchair detectives - not to mention teams of FBI investigators - hoping to finally crack the nation's only unsolved act of air piracy. Now a California man, who has assembled a team of investigators, thinks he may have finally solved case, which will be detailed in the two-part History Channel special D.B. Cooper: Case Closed? that airs on Sunday and Monday.

Experts review prophecies about the Mayan calender and the significance of December 21, 2012.

American serial killer H.H. Holmes has a dark legacy. Now, through his grandson's research, it may be that Holmes and Jack the Ripper are one in the same.

Don Wildman unearths relics from the world's greatest institutions to reveal secrets from the past. He examines each artifact to illuminate history's most incredible triumphs, sensational crimes and bizarre encounters.

These are some of the most spectacular examples of abandoned engineering the world has ever known. The series explores how and why they were built, consider the financial and social costs of their failure and examine the environmental and ecological impacts. The series also explores how experts came up with plans to make something beautiful or useful from the ruins.

A recently unearthed repository of materials formerly classified by the secret government....The Phenomenon Archives. This series covers the taboo subjects which have had light shed on them by pouring over the materials in this repository.

Mysterious events, compelling figures, and great unanswered questions from the past are explored in this National Geographic series.

Real cases of perplexing disappearances, shocking murders and paranormal encounters fuel this gripping revival of the iconic documentary series.

No description available.

Not long after the Cecil Hotel in Los Angeles opened in 1924, a guest committed suicide in one of its rooms, beginning a decades-long string of murders, suicides or otherwise unexplained...

A new investigation driven by declassified CIA documents suggests a secret history of bitter rivalries, government conspiracies, Cold War, WWII spycraft, and amazing achievements of Nikola Tesla, a truly gifted man.

Inspired by the iconic 1970s’ franchise, this series examines unexplained phenomena from all over the world.

Our planet’s lakes make up a huge freshwater reserve delicately balanced between the water that feeds them and the rivers they feed.