Is an access all areas look at the creation of some of the world's most ambitious, complex and technologically advanced construction projects. From subaquatic homes and the ultimate in billionaire luxury to futuristic towers and pencil thin skyscrapers, these are the structures they said could never be built. But now, using revolutionary technology and cutting-edge construction materials, three previously impossible builds are taking shape across the world. And is on site to follow their progress every step of the way.

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Documentary