Morning Glory has been described as a "cerulean jewel set in the earth" and a "diaphanous cupful of limpid sky." The vivid color of the pool has made it one of the most popular of Yellowstone's hot springs with visitors. Sadly, vandalism has diminished some of its former vibrant color as debris that people have thrown in the pool decreases water temperature. Photograph by Carol Polich. Measures 3.5” X 2.5”.