Oprah Winfrey has her own television network, so of course she has her own private land as well! In her case, it's a big slice of Orcas Island within Washington state, where Winfrey paid just over $8m for 43 acres of land. The island is still technically public, but so much of it belongs to Winfrey that there isn't much point in anyone else visiting it. Her home is palatial, but the 3,000 feet of pure sand and beach might be the best feature here.
Winfrey had the mansion on her island purpose built for her in 2007, but deliberately had it made in an old-style. All the materials are reclaimed or hand-forged, and she even had hardwood floor brought in from the old Sears' Chicago building. Somewhere within its walls is a full-sized library and reading room of the kind that millionaires always have on television, and a bathtub which is molded to the shape of her own body. Now that's luxury!