5. Dean Kamen – North Dumpling
If you’ve never heard of Dean Kamen, you’ll almost certainly have heard of his invention: the Segway.
Even though his two-wheeled gyroscope transport system didn’t gain as much popularity as he’d have liked, he still earned a huge income from it.
Located just off the New York coast, North Dumping is worth around $2.5 million and is around two acres in size.
Be prepared to call him “Lord Dumpling” if you should ever be invited to visit.