Mathematics and architecture don't always quite add up. In the Larrain House, that Cecilia Puga designed in the Chilean town of Los Vilos, this is exactly the case.
The basic scheme of this private house consists of three rough concrete volumes, stacked on top of eachother. All three of them are basic house-shapes. What makes the concept so playful is the fact that one of the three volumes is turned upside-down, exactly fitting on top of the other two.
Because of this layout, the house has spectacular spatial qualities, and at the same time loads of flexibility in use for it's owner, her children and her grandchildren. Other than that, it fits beautifully into the rugged landscape - with its long longitudinal lines toward the sea.
More images and a Spanish description can be found on the Chilearq website.