Ep 40. Secret Underground

Secret Underground, the 40th episode of the 16th season of Modern Marvels, takes us on a journey through the hidden world beneath our feet. From secret tunnels and underground cities to top-secret military bunkers and massive storage facilities, this episode explores the fascinating and mysterious world of subterranean structures.

The episode begins with a look at the ancient underground cities of Cappadocia in Turkey, where people have been living underground for thousands of years. We learn about the ingenious techniques used to create these cities, including ventilation shafts and water wells, and the benefits they provided, such as protection from invaders and extreme temperatures.

Next, the episode takes us to London, one of the most heavily tunnelled cities in the world. We explore the world-famous London Underground and the intricate network of tunnels and stations that transport millions of people around the city every day. We also learn about the secret tunnels and bunkers used during World War II, including the Churchill War Rooms, where the British Prime Minister directed his country's military operations from an underground bunker.

Moving on to the United States, we visit Cheyenne Mountain, a massive underground complex in Colorado that houses the North American Aerospace Defense Command (NORAD). We learn about the intricate security measures in place to protect this top-secret facility, including blast doors, airlocks, and high-tech surveillance equipment.

The episode also explores the world of underground storage, from wine cellars and food storage facilities to high-tech data centers and massive underground warehouses. We learn about the benefits of storing goods underground, including protection from temperature and humidity fluctuations and enhanced security.

Finally, the episode takes us to the world of underground construction, where we learn about the challenges and benefits of building structures beneath the ground. We explore some of the world's most impressive underground structures, including the Channel Tunnel, the world's longest undersea tunnel, and the Big Dig in Boston, one of the most complex and expensive construction projects in US history.

Throughout the episode, we meet experts from a range of fields, including geologists, engineers, and historians, who help us understand the science and technology behind these incredible structures. We also hear from people who have lived or worked in these underground environments, giving us a unique insight into life beneath the surface.

Secret Underground is a fascinating and informative look at the hidden world beneath our feet. Whether you're interested in history, science, or engineering, this episode has something for everyone, offering a glimpse into the remarkable human achievements that lie beneath the surface of our planet.