As of 2018, the National Park Service employs approximately 27,000 employees who oversee 419 units, of which 61 are designated national parks. There is a national park in every state except for Delaware where adventure seekers can hike; swim and see all kinds of wildlife. 

In honor of Parks and Recreation Month, we have outlined the best U.S. national parks to explore this summer. The results are in; and here they are, courtesy of U.S. News. 

1. Yellowstone
2. Yosemite
3. Glacier National Park
4. Grand Canyon
5. Zion National Park
6. Gran Teton National Park
7. Hawaii Volcanoes National Park
8. Arches National Park
9. Rocky Mountain National Park
10. Acadia National Park

Together, the national parks in the NPS draw in over 330 million visitors each year. Get #outside and #explore #parks today!