A new study by Michigan State University shows that Great Smoky Mountains National Park is the top national park in the U.S. for visitor spending.
The "Economic Benefits to Local Communities from National Park Visitation and Payroll" estimates that in 2010 the park's 9 million visitors spent more than $818 million in neighboring communities -- double the $415 million generated by Grand Canyon National Park, the second-ranked park in the study.





