Unlike most homes, you enter 12255 Sky Lane through the roof. The address, which is listed for $29.95 million, is accessible via an Italian marble driveway that winds down into a three-car garage. Alternatively, you can park on the roof itself, which doubles as a 20-car auto gallery. It’s the perfect way to show off your prized wheels. While many residences keep these gallery spaces tucked away in the basement, Sky Lane’s is front and center.