From July 1 through July 15, Apple is donating $1 to the National Park Foundation for every purchase made with Apple Pay at any Apple Store, on apple.com or through the Apple Store app for iPhone and iPad in the United States.

Apple Pay is accepted at select locations in some of the most popular national parks, from Yellowstone and Yosemite to the Grand Canyon and Muir Woods National Monument.

Proceeds will support the National Park Foundation’s mission to help protect and preserve national parks through conservation projects and other initiatives, as well as inspire the next generation of park enthusiasts with enriching youth programming.

According to CEO Tim Cook:

America’s national parks are an inspiration to us at Apple, and we know they are as important to many of our customers as they are to us. Our goal is to leave the world better than we found it, so this July we’re making it easier for anyone to help preserve the beauty of our natural, cultural and historical treasures.

Apple Watch owners who complete a walk, run or wheelchair workout of 3.5 miles (about 5.6 kilometers) on July 15, which matches the length of a hike from Old Faithful to Mallard Lake in Yellowstone National Park, will earn a special badge in the Activity app and unique stickers in the Messages app for iPhone, inspired by national parks.

Apple adds that App Store will soon highlight a collection of “some of the best apps to help users easily navigate and explore the country’s most beautiful national parks.”