Firehole River near Grand Prismatic Spring.Firehole River near Grand Prismatic Spring.The Grand Prismatic Spring area of the Yellowstone National Park.The Excelsior Geyser Crater.The Excelsior Geyser Crater.The Excelsior Geyser Crater.The Excelsior Geyser Crater.Weird formation around the Grand Prismatic Spring.The Grand Prismatic Spring of the Yellowstone National Park.The Grand Prismatic Spring of the Yellowstone National Park.The Grand Prismatic Spring of the Yellowstone National Park.The Grand Prismatic Spring of the Yellowstone National Park.The Grand Prismatic Spring of the Yellowstone National Park.The Grand Prismatic Spring of the Yellowstone National Park.The Opal Pool of the Yellowstone National Park.The Turquoise Pool of the Yellowstone National Park.The Excelsior Geyser Crater.Hot spring waters draining into the Firehole River.
