The idea of a national park was first formulated by painter George Catlin[?]. In his travels though the American west, he became concerned about the future of the Native Americans he met and the natural wonders he saw. In 1832 he wroted that they might be preserved,
The first effort by any government to set aside such lands was in the United States, where an Act of Congress signed by Abraham Lincoln on June 30, 1864 ceded Yosemite Valley and the Mariposa Grove[?] (heart of the future Yosemite National Park) to the state of California:
Several years later, a similar measure was proposed for an area in Wyoming and Montana, but problems with tourists and settlers in and around Yosemite, and the fact that the proposed reserve lay in more than one state, led to the idea of a federally controlled park. In 1871, Yellowstone National Park was established as the first truly national park. Following the better idea established in Yellowstone, Yosemite was created a national park in 1890, and followed soon after by other parks in many other nations.
National parks are usually located in places which have been largely undeveloped, and often feature areas with exceptional native animals, plants and ecosystems (particularly endangered examples of such), or unusual geological features. Occasionally, national parks are declared in developed areas with the goal of returning the area to resemble its original state as closely as possible. In some countries (e.g., United Kingdom) national parks may contain significant amounts of privately owned land, be used for agriculture and contain small towns and public roads.
Most national parks have a dual role in offering a refuge for wildlife and as popular tourist areas. Managing the potential for conflict between these two roles can be difficult, particularly as tourists often generate revenue for the parks which can be spent on conservation projects. Occasionally mineral resources are discovered in national parks - if attempts are made to exploit such resources it usually leads to considerable conflict with environmentalists who believe that no such activities should be conducted within these parks.
Some countries also maintain sites of special cultural, scientific or historical importance as national parks, or as special entities within their national park systems. Other countries use a different scheme for historical site preservation.
see also National Forest