Top 10: US summer attractions: Parks, Princesses and Prisons: TripAdvisor's top attraction picks for 2007.

1. Walt Disney World: Orlando
2. Cirque du Soleil: Las Vegas
3. Hana Highway: Maui
4. Grand Canyon: Grand Canyon National Park, Arizona
5. Central Park: New York City
6. Alcatraz: San Francisco
7. Top of the Rock Observation Deck: New York
8. Monterey Bay Aquarium: Monterey Bay
9. Bellagio Fountains: Las Vegas
10. San Diego Zoo: San Diego

SOURCE: TripAdvisor.com