Design that is simple yet astounding - not easy to achieve but pulled off brilliantly by the Dutch architecture and planning firm MVRDV with their Wozoco Apartments project in Amsterdam. The building's ingenius cantilevered box units were designed to add floorspace without increasing the building's footprint. Their wood cladding, juxtaposed against the glass and steel curtain walls of the main structure, enhance the building's eye-popping, playful appeal.