The first national park in the world, Yellowstone National Park remains one of the nation s treasures. It contains more than half the planet s geothermal features hot springs, geysers like Old Faithful, and the Yellowstone Caldera, which had such enormous volcanic eruptions it s been nicknamed a supervolcano. Yellowstone is equally famous for its remarkable assortment of animals, plants, and scenic views, from bison to wolves, arrowleaf balsamroot to Yellowstone sand verbena, Dunraven Pass to Mount Washburn. With Yellowstone National Park: An ABC Adventure, join nature photographers KC Glastetter and Jeremie Hollman as they take readers young and old on a letter-by-letter photographic journey through the park. Turn to the letter G and you ll find the rainbow-colored Grand Prismatic Spring, the largest hot spring in the western hemisphere. Go to Y and discover the Yellowstone cutthroat trout, prize of the fly fisherman; under F learn about the big fires of 1988 and fire s natural role in the park ecosystem.