Tucked on the pristine shores of Percy Priest Lake, about 10 miles outside Nashville, this massive water park and family recreation destination offers white-sand beaches, jet-ski and boat rentals, eight water slides, and even kayaking areas. In the summer, Dive-In Movies are a popular way to stay cool; you float in a lagoonlike pool while watching action on a 40-foot inflatable screen. Other activities include lake cruises, miniature golf, volleyball, basketball, and horseshoes. Allow 3 to 4 hours here.