When ancient architects completed construction on the Great Pyramid at Giza, they left behind the greatest riddle of the engineering world how did builders lift limestone blocks weighing an average of two and a half tons, 480 feet up onto the top of the pyramid? For centuries, adventurers and Egyptologists have crawled through every passageway and chamber of the Great Pyramid, measuring and collecting data in an attempt to determine how it was built. For the first time, a revolutionary theory argues that the answer may be inside the pyramid. Architect Jean-Pierre Houdin has devoted his life to solving this mystery by creating incredibly accurate blueprints of the Great Pyramid, using cutting-edge 3-D software. Unlocking the Great Pyramid follows Houdin and renowned Egyptologist Bob Brier in Giza as they put Houdins theory to the test.

British writer and historian William Lindesey explores the most remote parts of Chinas national monument. He questions peasants and herders, experts and scholars, in a bid to learn how long the Great Wall is.

Explore the ever-changing geology of North Americas spectacular Great Lakes, as we reveal exactly how they look beneath the surface.

The trenches gave him his self-appointed mission to save Germany, but it was Hitlers natural ability to address the crowds that allowed him to take advantage of a devastated population. However, without the Great Depression, would the Third Reich have existed?

Soldiers tell the amazing story of capturing the Ludendorff Bridge in the town of Remagen. The war reaches its endgame with the invasion of Berlin.

In one of the coldest winters on record, under-prepared US infantry divisions find themselves fighting off the German army in the Ardennes.

The trenches gave him his self-appointed mission to save Germany, but it was Hitlers natural ability to address the crowds that allowed him to take advantage of a devastated population. However, without the Great Depression, would the Third Reich have existed?

The Vietnam War was a decade-long struggle that humbled America. It has never before been told start to finish purely as a first person military chronicle: the raw, horrifying war as experienced by the men who fought it, believing they were there to win. Their experiences revolve around “tipping points”, affecting the crucial events that shaped military decisions and, ultimately, determined the outcome of the war. From the rise of Ho Chi Minh in 1959 and the subsequent formation of the Vietcong to the deadly battle in La Drang valley in 1965 through to the quagmire of the Vietnam War in the late 1960s and its eventual conclusion in 1975, no detail is spared in this three-part, back to back special.

Take a look at the most amazing factories in the world. Lift the lid on how millions of your everyday products and iconic designs begin life on the assembly line in a brand new series of Megafactories, The Mini Cooper is a unique insight into the construction of Minis brand new derivative. The Mini Coupe is the Oxford plants first ever two seater sports vehicle. Follow the journey of the Mini Coupe as it makes it way through this state of the art factory based in the heart of England.

Curt Doussett and Kinga Philipps challenge residents of Orange County, Calif., to come up with their most precious lost treasures at the Bowers Museum of Cultural Art in Santa Ana. Kinga has no problem finding two great prospects: stone bowls that are possibly prehistoric and a sword and pistol from a 19th century sea captain. Curt spies a set of rare Native American baskets in excellent condition from the Owens Valley Paiute Indians, probably made between 1910 to 1940.

As the new One World Trade Center takes its place in the Manhattan skyline, explore the construction of New Yorks iconic Empire State Building.

Meet the Natives follows a group of men from the South Pacific island of Tanna who travel to the USA – to observe the natives of these exotic lands. From cattle roundups and snowball fights in Montana, these men experience some of the best – and most unusual – activities that the USA has to offer. They provide a unique spin on life in America, filtering what they see through their own experiences and offering their perspective on homelessness, traditional gender roles, livestock artificial insemination, and more.

A unique story on the discovery of a 40-thousand-year-old, perfectly preserved baby woolly mammoth. Cutting edge science and Arctic adventure come alive in this story of a unique discovery: a perfectly preserved baby woolly mammoth that suddenly appears on a Siberian riverbank, triggering an extraordinary investigation into her life and death at the end of the Ice Age. Solving the mystery of her origins unites men whose lives are worlds apart except for their link to the woolly mammoth. The film interweaves the stories of the nomadic reindeer herder who found 40-thousand-year-old Baby Lyuba and a renowned palaeontologist who attempts to unlock her secrets. Following Baby Lyuba’s trail from the Siberian tundra to high tech labs across the globe, they search for clues that will reveal how she emerged into the 21st century, why she stayed so remarkably intact, and what the secrets hidden in her body may ultimately reveal about her life and the world of the woolly mammoth before the great extinctions.

A unique story on the discovery of a 40-thousand-year-old, perfectly preserved baby woolly mammoth. Cutting edge science and Arctic adventure come alive in this story of a unique discovery: a perfectly preserved baby woolly mammoth that suddenly appears on a Siberian riverbank, triggering an extraordinary investigation into her life and death at the end of the Ice Age. Solving the mystery of her origins unites men whose lives are worlds apart except for their link to the woolly mammoth. The film interweaves the stories of the nomadic reindeer herder who found 40-thousand-year-old Baby Lyuba and a renowned palaeontologist who attempts to unlock her secrets. Following Baby Lyubas trail from the Siberian tundra to high tech labs across the globe, they search for clues that will reveal how she emerged into the 21st century, why she stayed so remarkably intact, and what the secrets hidden in her body may ultimately reveal about her life and the world of the woolly mammoth before the great extinctions.