4. Yellowstone Club
Big Sky, Montana
Price: Lots from $2.5 million, homes from $3.5 million
Move-in date: Immediately
Contact: 888-700-7748; www.yellowstoneclub.comThis first invitation-only ski-and-golf community sits on 14,000 acres of mountainous terrain. The club has its own slope on Pioneer Mountain - complete with 12 lifts - and an 18-hole Tom Weiskopf-designed golf course, both included with membership. Owners can choose from two- and five-bedroom condo units, single-family homes, or a variety of home lots, all for full-ownership.