Top 10 Free Attractions in the USA 

10. International Rose Test Garden, Portland, Oregon

9. The Alamo, San Antonio, Texas

8. Central Park, New York

7. Lincoln Park Zoo, Chicago

6. Mount Rushmore Memorial Park, Keystone, South Dakota

5. The Getty Center, Los Angeles, California

4. Golden Gate Bridge, San Francisco, California

3. Great Smoky Mountains National Park, Tennessee

2. The Freedom Trail, Boston

1. National Mall and Memorial Parks, Washington, D.C