This week the National Parks Service celebrates 100 years—the U.S federal government agency was founded on August 25th, 1916 when President Woodrow Wilson signed a bill that mandated it "to conserve the scenery and the natural and historic objects and wildlife therein, and to provide for the enjoyment of the same in such manner and by such means as will leave them unimpaired for the enjoyment of future generations." Prior to this, the National Parks and National Monuments were all being run under the umbrella of the Department of the Interior.

In a video, President Obama praised the NPS: “From Glacier and Denali to Gettysburg and Seneca Falls, our more than 400 parks and other sites capture our history and our sense of wonder," he stated. "All across the country, the National Park Service is preparing for a big year. We’re revitalizing a grove of giant Sequoias in Yosemite; repairing the Lincoln Memorial; and enhancing the iconic entrance to our first national park at Yellowstone.”

Today, the NPS oversee 412 units (these include historic sites, battlefields, and monuments, as well as the beaches at Jacob Riis and Fort Tilden), 59 of which are designated national parks. They also run an Instagram account that is worth staring at every once in a while—a rep tells us, "We want our Instagram to be a window into all of the National Park Service, from epic vistas and adorable animals to historical artifacts and the daily work of our rangers." Click through for a look at the nation's parks, animals, and moments of Zen: