Way Time-Lapse from Yellowstone Nat’l Park June 2015 (Indian Flats Campground). I think you can also see some evidence of Aurora Borealis as the sky gradually turns green and has “waves” of color if viewed carefully. 450 pictures taken from 10:30pm-3:30am with Canon 5D Mark II, 16mm, 30 sec, f/2.8, ISO 6400 source