LEGO Architecture: Fallingwater close-up
This is an up-close shot of the workmanship of the Fallingwater model. It's another very complex and involved design, which can be seen by the intricate brickwork visible here.
Photo of LEGO Architecture exhibit by Wally Bahny for TechRepublic
I believe the open areas are actually parking. Odd, but there's parking spaces with cars in them all around the outside of the building. Not sure how they get up there, I always assumed some sort of elevator.