Even as you approach, it is hard to spot the new house by Marcio Kogan, it blends so well into its natural setting. The concrete roof of this low-lying country retreat, two hours by car from São Paulo, is camouflaged by a grassy lawn on its top, making the strongly horizontal structure almost invisible from a road on higher ground. “We seek an architecture that has the least impact possible on the environment,” says Kogan, Brazil’s best-known architect. “The house becomes a continuation of the surrounding topography.”