Waste-to-Energy Plant in Copenhapen (Courtesy BIG)

Where one architect might see an incinerator, Bjarke Ingels, principal at Dutch firm BIG, envisions a ski slope. Ingels has been fond of the mountain typology and he hasn’t been all that subtle about it, giving projects names like Mountain Dwellings and emblazoning Mount Everest on the side.

In his latest competition-winning proposal for Copenhagen, BIG takes the concept one step further, with a mountain you can actually ski down.

And it blows smoke rings, too!