This house, located within a national park on the southwestern coast of Wales, is sunk into the ground so the landscape remains nearly uninterrupted by its presence. It was completed in 1994 by design firm Future Systems. With turf-covered roofing and siding, the 222 House fits seamlessly into the surrounding field. “This is exemplary sustainable design, where you are integrating the home into the site and minimizing the visual impact,” architect Peter Koliopoulos says. The bathroom and kitchen are prefabricated pods that were lifted into the site during construction. An added benefit of the design concept is the geothermal insulation, which shields the home from wind and cuts energy consumption.