A private island in Polynesia with 10 acres of sandy beach and 22 separate structures. A New Jersey estate made for entertaining with an 80,000-gallon swimming pool and 13 imported fireplaces. A 15,000-square-foot Dubai mansion with amazing marina views, a full-floor master bedroom and two elevators. A park-like Houston home with a private, lighted tennis court and a five-car garage.
Ample space abounds in this week's featured listings—but that is just about all they have in common. Which expansive estate speaks to you?