The History Channel

There are 800 very old, very mysterious, man-made stone sites in the Northeastern part of the United States. Forensic geologist Scott Wolter heads to rural Pennsylvania to investigate one of them--a meticulously crafted stone chamber buried underground in the woods. When he realizes it may have been a ritual bath chamber for a secret society, he embarks on a quest for answers as to who built, when and why.

What is the meaning behind secret messages found throughout Washington, D.C.? Did America's Founding Fathers know something about ancient aliens that the general public did not? And if so, could this knowledge have been incorporated into the symbols, architecture, and even the founding documents of the United States of America?

Erich von Daniken's landmark book, Chariots of the Gods, brought attention to the mysterious phenomena of the Nazca Lines. Hundreds of gigantic lines, some in the shape of animals, geometric patterns and even an alien-like being, extend for miles throughout a remote Peruvian desert. Scholars are divided as to who built them, and why. Some Ancient Astronaut theorists believe that the massive markings have an extraterrestrial connection, and perhaps the ancient people of the region created these gigantic figures in tribute to the gods who visited them. And with one of the largest deposits of nitrates in the world--a key ingredient in rocket fuel and weaponry--could Nazca have been a mining operation for advanced beings in the distant past?

What came down in the forest outside the sleepy hamlet of Kecksburg, Pennsylvania on December 9, 1965? Some residents claimed to see an acorn-shaped metal object with strange, hieroglyphic writing on its side, half-buried on the forest floor. Astronomer Von Del Chamberlain wrote that the Kecksburg object was a meteorite. NASA consultant James Oberg theorized that it was a failed Russian probe, but now also thinks it was probably a meteorite. Often called the "Pennsylvania Roswell" in UFO circles, the debate raged until, in late December 2003, NASA finally released 39 pages of material and the Air Force released 2,800 pages on the case from its files. The only thing the government documents conclusively prove is that the object was not a Russian probe. But for UFO enthusiasts and researchers, many questions remain unanswered.

Visit one of the most haunted houses in America, the Lizzie Borden house, scene of the famous 19th century double murder. Watch as paranormal expert's record bizarre goings on in this house with eight cameras rolling, including the highest resolution infrared camera ever used in a paranormal investigation. Will science and technology finally prove the existence of ghosts?

Legends of a terrifying monster lurking in the back hills of Kentucky date back to the days of frontiersman Daniel Boone, but encounters with this mystery beast are increasing. Witnesses report alleged attacks by the creature and the sounds of ferocious screams from the wilderness. New photographic evidence may hold the key to uncovering the mystery. The MonsterQuest team goes on location to analyze the evidence, and heads deep into the dark forests, where they have their own frightening encounter.

Are sacred places the product of man's reverence for God--or the result of contact with ancient space travelers? Jerusalem's Temple Mount has been called a heavenly gateway. Islam's shrine at Mecca displays a Black Stone believed to have fallen from heaven. And the temple at Baalbek, Lebanon was built on a massive stone structure resembling a landing pad. Did man encounter divine beings at these holy places, or might they have met ancient extraterrestrials?

There are numerous historical, religious and mythic accounts of ancient civilizations being wiped out by volcanoes, earthquakes, floods, and meteors. Did god, or nature bring about such disasters? Or is it possible that celestial beings had a hand in the ancient world's catastrophic disasters?

What is the meaning behind secret messages found throughout Washington, D.C.? Did America's Founding Fathers know something about ancient aliens that the general public did not? And if so, could this knowledge have been incorporated into the symbols, architecture, and even the founding documents of the United States of America?

Explore the primal pagan rites of the Lombard's, as they fight for land and for a barbarian bride. We travel with the brutal Lombard leader, Alboin, as he breaks through the Roman defenses in Italy, and forces his captured wife to drink from her murdered father's skull. The skilled Lombard king Liutprand will face both Roman and Frankish attacks, as he vies for supremacy on the crowded peninsula. He will create laws, linking bloody barbarian rites with ancient Roman justice and establishing a new culture in the former center of the fallen Roman Empire that will last for centuries.

Informational programming.

Informational programming.

Informational programming.

Informational programming.

The gladiators of ancient Rome were the ultimate fighting machines. They waged bloody battles to the death for the entertainment of the masses--and to earn their freedom. From the depths of the vicious and magnificent Flavian amphitheater, to the buried brothel where they lived their last days, these are the secret lives of Rome's famed slave warriors. Peel back the layers to uncover the origin of these fierce fighters, as host Don Wildman heads into ancient crypts, subterranean chambers used for pagan worship, and to the school that taught the gladiators how survive... and how to kill.

A mysterious, stark terrain, 90 miles north of Las Vegas, goes by many names: The Box, Paradise Ranch, Groom Lake, Watertown Strip, and Dreamland. But most refer to the region as Area 51. Since the late 1950s, an array of UFO sightings has been reported above its skies. In 1989, revelations of Las Vegas resident Bob Lazar brought Area 51 to national attention. Lazar claimed to possess amazing inside information, but he wasn't the first to state that something strange was going on. Those who discount Lazar's theories think the government kept its activities from the general public for a more plausible reason. The base, built at the Cold War's height, housed testing of cutting-edge aviation technology. The cloak of secrecy was to keep the Soviet Union in the dark, not the American public, and experts expostulate that the government perpetuated these theories to disguise its real activities.

What came down in the forest outside the sleepy hamlet of Kecksburg, Pennsylvania on December 9, 1965? Some residents claimed to see an acorn-shaped metal object with strange, hieroglyphic writing on its side, half-buried on the forest floor. Astronomer Von Del Chamberlain wrote that the Kecksburg object was a meteorite. NASA consultant James Oberg theorized that it was a failed Russian probe, but now also thinks it was probably a meteorite. Often called the "Pennsylvania Roswell" in UFO circles, the debate raged until, in late December 2003, NASA finally released 39 pages of material and the Air Force released 2,800 pages on the case from its files. The only thing the government documents conclusively prove is that the object was not a Russian probe. But for UFO enthusiasts and researchers, many questions remain unanswered.

Visit one of the most haunted houses in America, the Lizzie Borden house, scene of the famous 19th century double murder. Watch as paranormal expert's record bizarre goings on in this house with eight cameras rolling, including the highest resolution infrared camera ever used in a paranormal investigation. Will science and technology finally prove the existence of ghosts?

Legends of a terrifying monster lurking in the back hills of Kentucky date back to the days of frontiersman Daniel Boone, but encounters with this mystery beast are increasing. Witnesses report alleged attacks by the creature and the sounds of ferocious screams from the wilderness. New photographic evidence may hold the key to uncovering the mystery. The MonsterQuest team goes on location to analyze the evidence, and heads deep into the dark forests, where they have their own frightening encounter.

Are sacred places the product of man's reverence for God--or the result of contact with ancient space travelers? Jerusalem's Temple Mount has been called a heavenly gateway. Islam's shrine at Mecca displays a Black Stone believed to have fallen from heaven. And the temple at Baalbek, Lebanon was built on a massive stone structure resembling a landing pad. Did man encounter divine beings at these holy places, or might they have met ancient extraterrestrials?

There are numerous historical, religious and mythic accounts of ancient civilizations being wiped out by volcanoes, earthquakes, floods, and meteors. Did god, or nature bring about such disasters? Or is it possible that celestial beings had a hand in the ancient world's catastrophic disasters?