Leave it to the Dutch [again] to create a highly functional and ingenious design for their dense urban fabric. Hofman Dujardin Architects developed the Bloomframe balcony to make it possible to extend one's apartment out past the facade. The fenestration becomes an inhabitable zone and a much needed breath of fresh-air. In doing so, the balcony can be "packed away" during the winter and opened up for the summer. I could imagine a high-rise in Rotterdam with random patterns of balconies extended out and littered with plants and furniture.