Waste-to-energy Power Plant Facility, Copenhagen, Denmark

Waste-to-energy power stations are usually ugly eyesores, but a new power plant planned for Copenhagen is different: it is designed to blow smoke rings and double as a ski slope. The facility has been announced as the winner of a competition to design a new waste-to-energy plant for Copenhagen, with expected completion in 2016. Designed by BIG architects to replace an adjacent 40-year-old plant, the roof of the new construction will feature 1,500 metres of green, blue and black-diamond ski runs.
Lifts will run alongside the stack to transport skiers to the top of the building, with the journey up affording passengers a view inside the plant.