Deep in the jungles of Mexico, the lost city of Chichen Itza contains ancient secrets of a mysterious civilization. Follow the scientists working to find how the Chichen Itza was built and how the bloody rite of human sacrifice shaped the city.

New evidence could help solve some of the Great Pyramid’s greatest mysteries. Follow the investigation into how it was built, revealing the truth behind its hidden tombs and deepest secrets.

The Great Wall of China is the biggest man-made structure on the planet -- and one of its biggest mysteries. Follow the scientific mission to reveal the ancient secrets of one of history's greatest empires.

Go inside the Acropolis, an ancient engineering marvel that has stood above Athens for thousands of years. Follow the scientists working to reveal its hidden mysteries: how it was built, what it looked like, and why it's still standing today.

A medieval engineering marvel might be the home to the remains of the Bible's Three Magi, and we follow the scientists and experts who are delving deep into the mysteries of this incredible religious site.

We reveal the centuries-old secrets and mysteries of one of the most remarkable examples of Victorian engineering. Follow the cutting-edge technology that built the Palace of Westminster, and find how it paved the way for the today's skyscrapers.