3| Celestine Pool - Yellowstone National Park

While other pools may be hotter, or larger, Celestine is by far the most beautiful. Shades of blue as deep and rich as the sky blanket the earth in a place where steam rises from the within. But with this beauty comes the unpredictable activity experienced by many who pass by her on the boardwalk, from a calming meditative sound to a rolling boil, Celestine poses no threat to those who respect her space. Yet, those who invade the depths of this pool hardly walk away. 

Welcome to tragedy with a view.