The Emperor's Lost Harbour

It's the most extraordinary feat of engineering in history, and one of the most iconic man-made structures on the planet - the Great Wall of China, stretching thousands of miles across barren deserts and treacherous mountains before finally plunging into the sea. But why did the Chinese go to such staggering lengths to build it, and what are the secrets that have enabled it to survive for over 2,000 years? Now, ground breaking science is re-writing its complex history and de-coding its mysteries to reveal that there is much more to the Great Wall than just bricks and mortar. Cutting edge chemistry reveals that the secret to the Great Wall's remarkable strength is a simple ingredient found in every kitchen, and a new survey also determines that its length is truly amazing, as we finally solve the enigma at the heart of the world's greatest mega-structure.

Built in 1755 at the height of the French and Indian War, Braddock's Road was one of the nation's most infamous military roads. Traces of this historic route, in western Maryland, still remain, buried beneath soil and brush, and a team of archaeologists is on the hunt.

A film on the "SAPPHIRE", the oldest identified wreck in Canadian waters. Parks Canada's underwater archaeology team is responsible for the excavation of the three-hundred-year-old frigate.

To outsiders, Turkmenistan is one of the world's least known countries. For the first time in ten years, a film crew has been free to visit spectacular excavation sites and follow international researchers into areas that have long been off-limits. Once considered the poorest part of the Soviet Union, oil and natural gas have brought new wealth to Turkmenistan today. A little known fact in the West is that 4,000 years ago, the country was home to one of the ancient world's centers of power. Although it flourished around the same time as the advanced civilizations of Mesopotamia and Egypt, the Margiana empire was later largely forgotten. Since the fall of the Soviet Union, the country has been slowly opening up to international researchers, and its astounding cultural heritage is coming to light.

Filmed in IMAX, a young Mayan boy who lives close to the ruins becomes acquainted with an archaeologist (Guerra) and asks her to tell him about his ancestors. The crew travelled to over 15 locations in Mexico and Guatemala, including Tulum and Chichén Itzá.

Protesters diary from Gezi Park - Taksim Square, Istanbul. Occupy Gezi movement started when the government decided to build shopping mall in place of the last green area that remained in the middle of Taksim Square.

Year 1969 - in Turkey. 60s youth were living the most excited days. There was a great effort to make a bridge in Istanbul, on the Bosphorus. Meanwhile, on the eastern border of Turkey, in a Kurdish city between the borders of Iran and Iraq that is left to its destiny, in Hakkari, Zap River was taking lives since there were no passage on it.

Up to one million gladiators are thought to have died in arenas across the Roman Empire. And, although fascination with gladiators has been high, the details of their lives and deaths remain fragmentary. Now, with the discovery of an ancient Roman burial site containing 80 skeletons thought to be gladiator warriors, National Geographic recreates the world of the Roman arena and how six gladiators lived, fought and died.