In underground home designs, this unusual house plan is the collaboration between the Netherlands architects at SeARCH and Christian Muller Architects. This underground home, located in the Swiss village of Vals, is set amidst a cluster of mountain houses and if you don’t look carefully you might miss it! The most striking thing about this stone house is the majestic Alpine view through a wide, elliptical opening in the hillside, revealing spacious outdoor entertaining areas that lead to the home’s main entrance. Another entrance from a nearby barn leads residents and guests through an underground pathway, providing an alternate entryway into the home. The circular opening in the mountainside allows for lots of windows, which flood interiors with natural light while framing the stunning mountain views.