World-famous Yellowstone, established in 1872, is the oldest national park in the United States and one of the most popular parks in the country. Sprawling across a basalt plateau in the north-west corner of Wyoming, this magnificent wilderness area spills into neighboring Idaho and Montana and forms the heart of the Greater Yellowstone Ecosystem, one of the largest and best-preserved temperate-zone ecosystems on the planet. The park is famous for its spectacular scenery, diverse flora and fauna, and fascinating geothermal wonders. Yellowstone boasts the world’s largest number of active geysers and offers a window into the powerful forces deep beneath the earth’s crust, the same forces that shaped this park and its dazzling and dramatic landscapes. The scenery ranges from snaking rivers and sweeping green valleys, to canyons, vast lakes, thundering waterfalls, and hissing lunar-like landscapes.