Modern Marvels

From Thomas Edison to Nikola Tesla, the world's greatest minds have enabled us to acquire our light, heat, and power with a simple flip of a switch. The foundation for all of this originates from one important source: Power Plants.

We'll see how the philosophy and architecture of today's American prisons emerged from the sewer cells and castles and dungeons of ancient Rome, medieval Europe and 18th-century England.

In the last decades, police have been swept up in a technological revolution that has transformed nearly all aspects of crime fighting.

Join us as we span the history of one of the world's most famous bridges: London's Tower Bridge. The world's largest bascule bridge when it was erected in 1892, it became a postcard image of London.

The Erie Canal was America's first superhighway-a ribbon of water carved through rock and wilderness. Discover how this engineering marvel carried countless immigrants and their dreams to the west.

Since the ancient pharaohs' time, the Isthmus of Suez has been the gateway between East and West. Today, the Suez Canal is a vital link in world trade and a point of controversy in geopolitics.

Deep beneath London runs a complex network of many miles of tunnels. Join us as we explore them.