The BelView apartments, located in Vienna, Austria, is scheduled to be completed this year. This massive structure accommodates 249 units and is uniquely shaped. This might be for design purposes but with a 87% efficiency rate, probably also has to do with aerodynamics and energy usage.

It reminds me of the Flatiron Building (posted below) by how it splits the street and the onlooker’s view of the remaining landscape. Although the BelView is a boomerang shape, the structures favor each other.

http://www.coop-himmelblau.at/architecture/projects/belview-apartments/