Can't help (obvously). Just don't like to see a request unanswered.
As I advised Smooth - check TripAdvisor.com. I've only used in in Europe, but there are plenty of American posters. I'm sure there must be suggestions on there. The good thing about it is you can sort by positive or negatice reviews, by price, by approval rating, by date of review etc.
Top 10 Attractions (from above website)