Exterior, Cabin Building Type, Flat RoofLine, Glass Siding Material, Metal Siding Material, House Building Type, and Prefab Building Type Olson Kundig Architects' Delta Shelter, in Mazama, Washington, is a 1,000 square-foot steel box home with a 200 square-foot footprint. Photo by Olson Sundberg Kundig Allen Architects/TASCHEN.  Photo 14 of 101 in 101 Best Modern Cabins from Small-Scale Architecture Around the World