Nearest Area: North entrance to Yellowstone National Park
Nearest Town: Mammoth Hot Springs
Brief Directions: This can be seen from town. It looks like a big steaming mountain of white rock.
Notes: This is a very popular tourist place, so sunrise is the best time to go. The early morning light illuminates the travertine to it's fullest colors (algae), and the cooler weather makes for great plumbs of steam.
Best Season: Autumn
Gear: Jacket, Tripod, Telephoto and wideangle lenses; patience