Another example of the craziest construction projects, the Shimizu Mega-City Pyramid, would have housed around one million people. The proposal was to build a floating city in Tokyo’s harbor that would so big it could house 100-storey skyscrapers inside it. Whilst logically sound, especially for an overpopulated city like Tokyo, the technical difficulties ultimately spelled its doom. The design was to make the pyramid of up to five trusses stacked on top of one another, each about the size of the Great Pyramid of Giza. Whilst unrealized, this is something straight out of sci-fiction and remind the author of Hive Cities in the Warhammer 40,000 Universe, only on water! We make no apologies for the “geek out” moment!