A racetrack in the backyard

There aren't many places in the world where you can drive fast without the worry to lose the driving license. Of course there are racetracks, or even the Isle of Man and the german Autobahn, that are exempt from the speed limits. What if, you're a millionaire and you don't want to move too far to vent your passion for speed? In Australia, a wealthy man called Dean Willis has become popular because of his particular backyard, he has spent around 10 million dollars to build his own private track behind his house!