The Houston Dome Project is a radical attempt to provide a solution to the city's damage from hurricanes, heat and the growing problem of global warming.
Connecting Russia and Alaska this would be the most ambitious and expensive tunnelling project ever attempted. CGI shows how the project could take shape.
Personal Pods are a high-speed, non-stop, self-driving transit system that could solve traffic problems in Washington DC. How would they work?
Chicago is home to some of America's most iconic skyscrapers, but with real estate at a premium, could an underground city be the solution to the space crunch?
Shanghai faces a double crisis: overpopulation and urban sprawl. Could the solution be building up and constructing the planet's tallest tower, over 1.5km high?
Some engineers believe the way for New Orleans to escape the water is to build a floating city. Long a dream for engineers, science has finally caught up with the...