The snail house
The charming Snail House was designed by Atelier d.org and is located in Reinhardsmunster, France. Its original architecture was imposed by the terrain, a very challenging slope According to the architects, this layout offered many advantages, such as respect of the original land, minimal earth-moving, multiple openings with centered views, direct entrances to each storey (the roof is also fully used), small visual impact, efficient natural thermal insulation.
via