
Yellowstone is home to the world's grandest collection of geysers and hot springs. Old faithful may be the most famous park feature, but the enormous hot spring of grand prismatic may be its most dramatic. To fully capture the bright turquoise pool and colorful runoff, I climbed a small hill on the opposite side of the pool from the busy boardwalk. From the high vantage point and with an overcast sky, I was able to give the vibrant colors and patterns a life of their own.