If I had endless money I would build a huge house with all kinds of state of the art technology and high end components. It would have a huge garage so I could put all my cars that I would be buying as well. Then I'd get some kind of long term investments and put a bunch of money away to ensure that if the golden goose ever died that I'd have enough money to live on for the rest of my life.
I'd probably also start a NASCAR team.