Yellowstone and Grand Tetons, Wyoming/Montana - Marc Haegeman Photography

The Grand Prismatic

The most spectacularly beautiful geothermal feature in Yellowstone is the Grand Prismatic. This 370 ft wide hot spring is the third largest in the world. Its distinctive rainbow colors are formed by different sorts of thermophile bacteria. Only the hottest center of the spring (up to 87° c) is virtually lifeless.

Grand PrismaticYellowstone National ParkgeyserWyomingcalderavolcanogeothermal