5. Ellison Estate — $200 million 

Chances are that you’ll get lost if you go to the Ellison Estate. This opulent, Japanese-style home in Woodside, California sits on 23 acres and boasts 10 separate buildings, a man-made lake and a bath house. It’s modeled after a 16th-century Japanese emperor’s palace and took a whopping nine years to design and build. Yes, you read that right.