DOLLYWOOD

The 17-year-old theme park hasn't stopped growing since it opened. This year, the separate-admission Dollywood's Splash Country water park debuted.

Next season's $10 million expansion at the theme park will include a simulation ride, a restaurant and a Dolly museum.

Runners-up: Neyland Stadium, Ripley's Aquarium of the Smokies and Great Smoky Mountains National Park