I have always been a fan of the architectural firm of Lake/Flato in San Antonio, Texas. They combine clean and thoughtful design with an honest use of materials and an awareness of sustainable design. This is partially accomplished by using locally available materials and featuring the unique textures of each. In their work, stone and corrugated sheet metal can work in harmony and compliment each other.
Although the shape of the structure appears to be very simple, there was much thought given to the proportion—the height of the chimney, window and door placement, and the slope of the roof. The design of this home is enriched by the hue and texture of the stone. The structure is in harmony with its environment as the main wall material comes from the environment. Green building can be both energy efficient and aesthetically pleasing.
source: Lake/Flato