Wild, spectacular Yellowstone thrills visitors with gushing geysers and free-roaming wildlife. Grand Teton entices with jagged peaks and glacial lakes. Packed with information for everyone from families with small children to hardcore outdoor adventurers, this guide takes you there. Thermal Wonders: From world-famous Old Faithful to gem-colored hot springs, Yellowstone's wild thermal features. Wildlife: Bison, elk, bears, moose, wolves, bald eagles - this guide tells you where to spot them. Outdoor Fun: The best spots for hiking, camping, rock-climbing, skiing, fishing, boating, and more. Insider Tips: Hundreds of places to stay, eat, and play, as well as how to find a wealth of hidden treasures. Beyond the Parks: From the Wild West bluster of Cody to the exhilarating ski slopes of Jackson Hole.