Ever been mesmerized by the swirling colors of Grand Prismatic Spring and wondered what fuels that otherworldly boil? It ...

Underneath Yellowstone National Park, magma bubbles and flows. But exactly how close it is to the surface has long been a ...

The Midway Geyser Basin's Grand Prismatic Spring is the largest hot spring in Yellowstone and one of the largest hot springs in the world. Measuring approximately 370 feet in size and around 121 ...

The Grand Prismatic Spring is the largest hot spring in the U.S., tucked away in Yellowstone National Park in Wyoming. The park is known far and wide for its beauty, with lots to explore while on ...

How the Grand Prismatic Spring Gets Its Kaleidoscopic Colors The beating heart of Yellowstone National Park is without a doubt the Grand Prismatic Spring—the largest hot spring in the U.S.

M illions of people visit Yellowstone National Park’s hot springs. There’s Grand Prismatic, the park’s largest and brightest spring known for its deep orange, yellow and turquoise colors ...