Tokyo's Skytree soars 634 metres (2,080 feet ... architects went even bigger and the Skytree was certified as the world's tallest tower by Guinness World Records when it opened in 2012.

How a central Tokyo ... Tower. Kataoka wanted to ensure that works by artists such as Sopheap Pich, Sam Falls and Bernard Frize blend in with the spaces, and keep residents in touch with nature ...