August 25th is the National Park Service Birthday and the National Park Foundation welcomes you with free admission. There are many free events going on at several parks.
This will be the 96th birthday of the National Park Service as congress established the National Park Service in 1916. Back then, there were 35 national parks, and now there are 397!
What is your favorite park to visit? Tell us in a comment!
Image thanks to National Park Foundation.