America's National Parks: The Insider's Travel Guide
Mainly in Wyoming, though it juts into Montana and Idaho, Yellowstone is the oldest national park and is most famous for its Old Faithful geyser.
Luxe Way: The Ranch at Rock Creek
At this new 6,600-acre property in Montana, four hours by car from Yellowstone, guests ride horses and fly-fish by day; at night, they can choose four-poster beds in the lodge or safari-style tents by the creek.
Photo © The Ranch at Rock Creek.