Exterior, House Building Type, and Stone Siding Material Looking like a burrow on the side of a mountain, Villa Vals – a Swiss holiday rental available through Boutique Homes was designed by Architects Bjarne Mastenbroek of SeARCH and Christian Müller of CMA. The entrance to the property is through a nearby wooden barn, which has a concealed underground tunnel that runs through the mountain into the villa’s subterranean core.  Photos from 13 Subterranean Homes That Are Out of This World

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Looking like a burrow on the side of a mountain, Villa Vals – a Swiss holiday rental available through Boutique Homes was designed by Architects Bjarne Mastenbroek of SeARCH and Christian Müller of CMA. The entrance to the property is through a nearby wooden barn, which has a concealed underground tunnel that runs through the mountain into the villa’s subterranean core.