1. This Frank Lloyd Wright masterpiece is on the market for the first time—The legendary architect Frank Lloyd Wright designed this 2,674-square-foot residence for Paul Olfelt, a radiologist, and his family, in 1958. Completed in 1960, the home was built into a hillside and is surrounded by 3.77 wooded acres near downtown Minneapolis. Up until now, the Olfelts have been the home’s sole occupants.