One of the most crowded cities in the world – and also one of the shortest on available land area – Tokyo, Japan is a city bursting at the seams. Hoping to relieve the stress of alarming overpopulation, the city's construction industry has trained its sights on the only vacant lot around – the waters of Tokyo Bay. Witness the impossible dream of city planners: to build a massive pyramid over the water, with skyscrapers suspended like peapods within its enormous frame.
Called the Shimizu Mega-City Pyramid, it would stand a kilometer tall and provide housing for up to 750,000 people. Even more amazing, the entire construction process may proceed without the work of a single human builder. With the invention of new super-lightweight materials, humanoid robots and self-assembling structures, the pyramid might be the first city in the world to build itself!