Arca is a gorgeous arched retreat in the Brazilian rainforest
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The 130-square-meter home is elevated on a concrete pier foundation and topped by a single metal shell that forms the roof and walls. Made of a composite of carbon steel, aluminum, and zinc, the large Galvalume shell gives the home an industrial feel that’s tempered by the Eucalyptus boards that clad all of the interior walls. Since the shell is self-supporting, there are no support columns, allowing the architects to maximize interior space and cap both ends of the shell with floor-to-ceiling...