Yellowstone Welcome to the world's first national park - Yellowstone! The golden rocks, effervescent waters, teeming forests, meadows and streams of Yellowstone have been dually christened by the United Nations as a World Biosphere Reserve and a World Heritage Site. This is North America's Serengeti, where 1,700 kinds of plants sustain 60 mammal and 311 bird species. Here, 150 lakes and 500 streams give birth to mighty rivers and thrive with 24 species of fish. The generally placid flow of these watercourses is spectacularly interrupted by nearly 300 waterfalls. Like inverted waterfalls, Yello...