In Japan, plans are underway to build Sky City, the tallest structure on Earth. The towering, vertical city would accommodate more than 100,000 people and provide for every aspect of modern life, including schools, homes, parks, offices and shops. A solution to Tokyo’s terrible land crunch, Sky City would be home to the world’s very first homesteaders in the sky.
The futuristic concept of Transatlantic rail travel could be a reality. Magnetically levitated trains traveling at 5,000 mph could travel from New York to London in less than an hour while providing passengers comfort in climate-controlled cars. Design concepts and prototypes are under construction, but the potential for disaster is great.
After decades of neglect, New York’s once great subway system was nearing collapse. A complete overhaul of the entire New York subway system aims to restore its legendary status, and it's one of the most ambitious public works projects in the history of the US.
Building a bridge across the Bering Strait holds the potential for unprecedented economic growth across North America and Asia. With design concepts underway and many dangers to consider, the bridge would span 55 miles across the Arctic Ocean's violent seas and crushing ice.
Tokyo is one of the most crowded cities in the world, and to relieve the stress on a city bursting at the seams, engineers are in the process of designing a massive pyramid. The incredible structure could be home to as many as 750,000 people, and with self-assembling structures, it might be the first city in the world able to construct itself.
The Alps are a scenic wonder to most of the world, but to merchants and truckers, they're roadblocks and bottlenecks. Engineers have designed a solution to keep Europe moving more efficiently, the AlpTransit Tunnel, an incredible 35-mile tunnel directly through the Alps.
Part of the Delta Works in the Netherlands, the Maeslantkering is a storm surge barrier responsible for the safety against large-scale flooding. This marvel of engineering is controlled by a supercomputer and one of the largest moving structures on Earth.
The Hong Kong International Airport is the largest civil engineering project in history. An incredible feat of engineering, it's the largest enclosed space in the world and construction requires the leveling two small islands with a completely new transportation infrastructure for access.
One of the world's most vital waterways, the Panama Canal is critical to the shipping industry. Ships today, however, are built too large to make this journey, and now teams of European and American engineers will compete for a widening design.
The Big Dig, two interstate highways constructed beneath Boston, is one of the most technically challenging infrastructure projects in US history. The project includes a new tunnel beneath the city's harbor and the widest cable-stayed bridge in the world.