This April 21 - 29 as America celebrates National Park Week –– a chance to hike, learn, share, and give back in the nation’s 397 national parks. Each year, we take this time to celebrate what we all have inherited as Americans – 84 million acres of the world’s most spectacular scenery, historic landmarks and cultural treasures.

Whether it is your first trip, or the latest of many memorable park experiences, National Park Week is a chance for all Americans to get active while experiencing the amazing places that make up the national park system for FREE. Visit any of America’s national parks and enjoy free admission all week long!

Together, we are owners, protectors and lovers of this land. Whether you are visiting, volunteering or interested in sharing your national park experience with the world, below you will find all the resources you need to make your National Park Week experience a memorable one.

To get you warmed up, we've combed the web to compile the most viral of U.S. National Park videos, the perfect inspiration for the week-long celebration that's co-sponsored by the National Park Foundation, a non-profit that works to preserve and promote the parks.

From Yosemite to Death Valley to the National Park Service-administered memorials in DC, here's a timely look at some of America's favorites. (Source)