Jeff Williams' father was a seasonal Park Ranger with the National Park Service, taking his family out to Wyoming every summer.
Now, Williams still looks out over the parks, albeit from a different vantage point. He is currently the ISS commander of Expedition 48, and recently broke the United States record for the most cumulative days in space.
He also is a big fan of the parks, and this week, in honor of the National Park Service's 100th birthday, Williams posted many of his pictures online, along with a touching video tribute to the Parks that you can watch above.
All of the images Williams took are composites, made of many images stitched together, because even from low-earth orbit it's hard to capture the entirety of most parks in a single image. Enjoy this beautiful look at some of the prettiest parks in the country.