Watch as spectacular CGI animation sheds major cities of steel, concrete, air, ocean and bedrock - layer by layer, act by act - in an investigation of each city's hidden infrastructure.

Explore the advanced technology developed by ancient civilizations and travel back in time to understand what motivated these early inventions. From pagodas to aqueducts, learn how these structures came to life.

History's most brilliant mind was also its most dangerous. With 300 inventions, Tesla's mind still dominates our world. While he was making millions, he also made enemies. His research was lost after a mysterious death. Recently declassified documents may help solve the mystery.

For thousands of years, alternative truths have been hiding in plain sight, locked away with secret codes and symbols whose meanings were known only to the initiated until now.

Despite being one of the most studied civilizations, rich in history, culture, science and art, much of Ancient Egypt remains a great mystery. In this series, experts dive into the secrets of Ancient Egypt and use cutting-edge archaeological technology to reveal hidden truths.