That's BIGski

Stand by for the world's biggest structure, a £2 billion “city inside a building” which is due to be erected in Moscow, where cash is no concern. Almost 1 500 ft into the sky and housing up to 30 000 residents, the Crystal Island will contain more floor space than any other building on Earth. It will be twice as wide as the Millennium Dome, nearly double the height of Canary Wharf tower, and there will be 27 m sq ft of floor space; four times as much as the Pentagon building in Washington.

As well as 900 apartments and 3 000 hotel rooms, the project will include an international school for 500 pupils, a cinema, museum, theatre, sports complex and dozens of shops. Parkland around the complex will offer cross-country skiing and ice-skating in the winter. It could be completed within the six years.