You'll find water adventures for every age.
The General Jackson Showboat is a 300-foot paddle-wheel riverboat with four large decks and a two-story Victorian theater where you can catch an interesting mix of shows -- everything from live music to the Peking Acrobats (packages vary; tickets start at $18 for adults, $14 for kids, generaljackson.com).
When the weather is warm, you can do some boating of your own. Choose among a variety of lake adventures at Nashville Shores, including kayaking, banana-boat rides, and a giant trampoline that floats. Big kids will love the nine wild water slides, and you'll have a hard time dragging your little ones out of the Wacky Pond Kiddie Pool ($24 for adults, $18 for kids under 47 inches tall; nashvilleshores.com).