Behold the Phoenix Towers, a proposed 47-hectare complex designed for the Chinese city of Wuhan. The tallest tower will reach one kilometer in height, making it the tallest structure in the world. The "blatantly iconic" towers will also purify the city's polluted air and lakes.
While it would be interesting to see these built, I'm putting this concept firmly in the "I'll believe it when I see it" category for now.
Remember how Broad Group was going to build the "world's tallest" building, from prefabricated parts, in 3 months? Gee... I wonder how that worked out. Oh wait, they haven't built anything yet. This may be a different case, and China has tons of really tall buildings under construction, but this seems a bit much to swallow from a feasibility standpoint. It's awesome, but it is also more likely than not going to stay un-built.