The Villa Vals is a unique creation from SeARCH and Christian Muller Architects. The architects wanted to construct a home that would be part of the land not one that would take away from it which is why the majority of the home is underground. Villa Vals is literally set into a mountain slope and has the most incredible views of the Swiss Alps surroundings and is a stones throw away from the Thermal Bath of Vals. Being a house that is mostly underground, Villa Vals doesn't look claustrophobic and lots of natural light floods the space.  
(FYI, you can actually rent this house)