Cottage Life

Jennifer Marshall and Ryan Sprague investigate one of the most mysterious UFO events in U.S. history.

U.S. Navy veteran turned private investigator Jennifer Marshall and journalist Ozzy Mora investigate chilling claims and a mysterious death at the infamous Cecil Hotel in Los Angeles.

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

The failed controlled demolition of The Clarion hotel in Las Vegas; substandard soil conditions and reclaimed land are among the reasons for construction site collapses; how construction, urbanization and heavy equipment contribute to sinkholes.

Experts investigate a fiery overpass collapse in Philadelphia, a plummeting radio telescope and a building collapse crisis in Nigeria.

Private investigator Jennifer Marshall and paranormal researcher Sara Gray travel to Rhode Island and visit the "Conjuring" house to investigate some of the most terrifying mysteries behind the home that inspired the supernatural film series.

Jennifer Marshall and Ryan Sprague investigate one of the most mysterious UFO events in U.S. history.

U.S. Navy veteran turned private investigator Jennifer Marshall and journalist Ozzy Mora investigate chilling claims and a mysterious death at the infamous Cecil Hotel in Los Angeles.

Most accounts of UFO sightings can be explained by and attributed to normal earthly phenomena. Those that cannot be solved, however, have police investigators, government officials and researchers puzzled, even decades later in some cases. In each episode of "Close Encounters," two stories of alien phenomena around the world are investigated, re-created and reviewed by researchers. In the telling

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Investigating significant historic and contemporary sites from the revealing vantage points of drone, satellite and aerial photography.

An enormous fiery vortex in Redding, Calif.; the island nation of Malta loses a natural treasure; a mysterious radioactive hotspot is discovered near Chernobyl; an unknown force lays waste to a mountain forest in Italian Alps.

Investigate an abandoned village in the shifting sands on Dubai's outskirts and a collection of inexplicable stone circles in Colombia; wing your way over a mysterious hilltop tower in Iran and a puzzling purple phenomenon in Chile's Atacama Desert.

Uncover a vast underground city in Turkey that served as a refuge for Christians and Jews. Investigate a mysterious chalk chamber in England, visit a secret Etruscan complex beneath an Italian wine cellar, and map an ancient tunnel network in Iran.

Marvel at the crystal caves and underground chapels of Poland's Wieliczka salt mine. Tour a secret Cold War bunker in England, unearth a 3,400-year-old royal settlement in Egypt, and try to solve the mystery of China's enigmatic Longyou Caves.

Investigate a tomb in Naples that may contain a prince who inspired the legend of Dracula. Read the desperate letters of Jewish rebels hidden in an Israeli cave, tour a 6,000-year-old labyrinth in Malta, and see the oldest human burial in Africa.

Crawl through a notorious brick-lined tunnel system in a historic Florida neighbourhood. Open a window into the lives of elite Greek families in Naples, explore a three-story underground city in Iran, and find 2nd-century barracks buried in Rome.

Explore a labyrinth built beneath Washington, D.C., by an eccentric entomologist. Admire a fresco-filled Roman mausoleum, spot intricate chambers carved into Colombia's volcanic rock, and see a sprawling network of hand-dug tunnels in Liverpool.

Walk the service tunnels hidden beneath Emperor Hadrian's lavish villa in Italy. Uncover a chilling mass grave from the Thirty Years' War in Germany, find the foundations of a Roman basilica in London, and glimpse Neolithic life on a Danish island.

Encounter kids' drawings on the walls in Pompeii that expose the city's violent gladiatorial past; check out a mythical sculpture unearthed by an Indian tsunami, a 12-century temple in quake-prone Mexico; a sunken ship in Utah's Great Salt Lake.

Explore evidence that ties a meteor strike to a Biblical tale; delve into a treasure-filled tunnel revealed by a sinkhole in Mexico, a medieval cave shrine exposed during a UK landslide and famine warnings brought to light by a severe drought.

A thousand-year-old Italian tower is brought to the brink of collapse; a Viking stronghold in Greenland, inexplicably abandoned; the ghost WWII bomber that vanishes on its return to base.

In Russia, 34,000-year-old graves are discovered; a team attempts to locate a World War II British airplane that went missing in Iceland; tiny fossils in an Alaskan riverbank; a massive, previously undiscovered depression in the ice in Antarctica.