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The house's "traditional" feel, Koolhaas says, is "only as thick as the layer of wood on the outside." When entering, the eyes travel straight back through the massive windows to the green yard beyond. "It appears as though there is no house behind the facade, like the houses on a movie set," he says. Photo 3 of 8 in Triangular House by Laura C. Mallonee

Triangular House

3 of 8

The house's "traditional" feel, Koolhaas says, is "only as thick as the layer of wood on the outside." When entering, the eyes travel straight back through the massive windows to the green yard beyond. "It appears as though there is no house behind the facade, like the houses on a movie set," he says.