A look at extraterrestrial mysteries, including close encounters, crop circles, Area 51, ancient texts and UFOs.

A look at legendary beings, including werewolves, angels,vampires, the Loch Ness Monster, Chupacabra and Bigfoot.

A look at sacred sites, including the Giza Pyramid and the Chartres Cathedral.

A look at extraordinary abilities, incuding extreme strength and endurance, telepathy, clairvoyance and paranormal empathy.

A look at mysterious writings, images and relics, including Peru's Nazca Lines geoglyphs, the Voynich manuscript and China's Terracotta Army.

A look at paranormal phenomena, including ghosts, apparitions and spectral curses.

A look at megastructures, including Mexico's Olmec heads, Easter Island's moai statues, Jordan's ancient city of Petra and Armenia's Geghard monastery.

A look at sites with alleged healing powers, including the grotto of Lourdes, Peru's ancient Machu Picchu ruins and the Amazon rainforest.

A look at sacred texts, including the Bible, the Book of the Dead and the Tao Te Ching.

A look at mysterious ancient cultures, including the 12 cities of the Indus Valley, the Forgotten Kingdom of Tibet and the lost continent of Lemuria.

A look at revered religious artifacts, including the Holy Grail, Buddha's Tooth, the Ark of the Covenant and the Shroud of Turin.

A look at mysterious cults and orders, including the Freemasons, the Knights Templar, Skull and Bones, and the Hermetic Order of the Golden Dawn.

A look at scientific mysteries, including water memory, morphic fields, time travel, the placebo and nocebo effects, and virtual reality matrices.

Examining global examples of human services fueled by religious and cultural beliefs that include ritualistic burnings and bloodlettings.

Ten notable cases of information that were deemed unacceptable for public consumption include missing Biblical gospels and a baffling manuscript.

Searching for the truth amidst the hidden identities of historical figures such as Jack the Ripper, D.B. Cooper, and the Man in the Iron Mask.

Exploring significant religious sites across the globe, including South Dakota's Black Hills and a monastery in Catalonia.

Analyzing notably enigmatic artwork such as da Vinci's "Last Supper", "Girl with a Pearl Earring", and a crucifixion icon with real teeth

A look at ancient and unorthodox medical treatments from regression therapy to herbal supplements.

Assessing unusual cases of people who vanished without a trace, including an explorer, a British secret agent, and an entire family.

Exploring the unanswered questions of the Second World War, such as Raoul Wallenberg's fate and who betrayed the family of Anne Frank.

Tracing the origins of mummification in cultures beyond Egypt, as well as delving for answers to unresolved mysteries behind the practice.

A search for answers to notable urban legends including Prague's history of the occult, Moscow's hidden metro line, and the discovery of a walrus skeleton in a London mass grave.

Analyzing the causes of obscure medical conditions such as Munchausen Syndrome, Stendahl Syndrome, and mass hysteria.

Uncovering previously classified military operations including the recruitment of Nazi scientists in America following the Second World War and the government's use of false flags.

Exploring unknown technological innovations including Nikola Tesla's Wardenclyffe Tower and Stanley Meyer's water-driven fuel cell that had previously been buried by government initiatives.