This 4,380-square-foot Scottsdale house, known as “America’s Most Original Home,” is on the market for $4.2 million. The structure was built  in 1980 by Sunnie and Bill Empire around billion-year-old granite boulders that sit in a ancient archaeological site. With boulders making up 60 percent of the property’s walls, the home features three bedrooms, two and a half baths, a great room, guest quarters, a library, a kitchen with high-end appliances and a massive fireplace. The property bordered by Whisper Rock Golf Course.