7. Changsha Sky City
The Sky City Tower in Changsha, China was destined to become the world’s tallest skyscraper. Designed by China’s Broad Sustainable Building, this structure was deemed unsafe and failed to receive the necessary government approval to proceed. Work on the building ceased after only a few days in 2013, and the hole in the ground has since been filled with water so that villagers can raise fish here.
8. Tokyo Shimizu Mega City Pyramid
The proposed Mega City Pyramid is earmarked for Japan’s Tokyo Bay, and is designed to address the city’s lack of space with it’s ability to house 750,00 people. So large will this pyramid be that it is awaiting the invention of lightweight materials to support the weight of the structure which, at 2,004 meters high, will be the largest man-made structure in the history of the world.