Rotterdam's Urban Cactus housing project (UCX Architects) uses ingenious staggered terraces to make huge, sunny spaces, and a building profile that seems to have been parachuted in from 1945's future.
They placed the 98 residential units on 19 floors, using the pattern of outdoor spaces to determine the overall appearance of the project.Link (via Futurismic)
The slightly irregular pattern alternates these outdoor spaces to create what are in effect double-height spaces. Each unit then receives more sunlight than a typical stacked composition.
Update: Fabio FZero sez, "The cactus building reminded me of this other architecture experiment in Montreal, created for Expo '67. It looks like a bunch of matchboxes stacked on top of each other, but provides a garden with open and unblocked view for all apartments. Impressive!"