4. Oprah Winfrey ($88 million)
Also called ‘The Promised Land’, this enormous mansion is owned by Oprah Winfrey and based in California. A 42-acre estate with 6 bedrooms, 14 bathrooms, gourmet kitchen, wine cellar, theater, multiple terraces, equestrian facilities, but also pools, koi pond, 2 acre avocado grove, lakes for fishing and much more.