The world's richest man isn't a very flashy guy. He doesn't seem to spend on material things for himself. His clothes look normal. He's got geeky old-man-looking glasses. And he drives a Prius. But when it comes to his home, Gates isn't stingy at all. His home is estimated to cost over $150 million.

1. He's got an aquarium with rare animals like dolphins, whales, sharks. Gates made sure they wouldn't do kill each other in there.

2. This is the dust room, perfect for relaxing when it rains.

3. From the outside, it looks unassuming. Still good though.

4. This exterior is completely made of glass so Gates can gaze on his lake and city.

5. The interior of one part of his house. Looks expensive. It probably is.

6. The TV is pretty modest-sized, but who cares when the view outside is more beautiful!

7. This is the master bathroom. While there isn't a lot of privacy in it, it looks very very spacious.

8. The bedroom comes with plush floors and a bed that sits on the ground.

9. Here's how the pool looks like and it almost looks like it is part of the floor.

10. Even the sinks are unique.

11. This looks like as if it were part of a resort.

12. Here's a small part of the kitchen, and even this looks nicer than the one you have at home.