Landscape photography shows the spaces within the world, sometimes vast and unending, but other times microscopic. Landscape photographs typically capture the presence of nature but can also focus on man-made features or disturbances of landscapes. Landscape photography is done for a variety of reasons. Perhaps the most common is to recall a personal observation or experience while in the outdoors, especially when traveling. Others pursue it particularly as an outdoor lifestyle, to be involved with nature and the elements, some as an escape from the artificial world. Many landscape photographs show little or no human activity and are created in the pursuit of a pure, unsullied depiction of nature, devoid of human influence—instead featuring subjects such as strongly defined landforms, weather, and ambient light. As with most forms of art, the definition of a landscape photograph is broad and may include rural or urban settings, industrial areas or nature photography. Environmentalism Some of the most important and celebrated landscape photographers have been motivated by an appreciation of the beauty of the natural environment and a desire to see it preserved. The work of William Henry Jackson in the mid-19th century was instrumental in convincing Congress in 1872 to create Yellowstone, the first national park in the United States. Photography produced by Philip Hyde for the Sierra Club found extensive use in promoting the preservation of natural places in the Western United States during the 20th century. Renowned landscape photographer Ansel Adams received both a Conservation Service Award and a Presidential Medal of Freedom in recognition of the influence of his work on the preservation of wilderness and fostering of environmental consciousness. Subjects Landscape photography commonly involves daylight photography of natural features of land, sky and waters, at a distance—though some landscapes may involve subjects in a scenic setting nearby, even close-up, and sometimes at night. Photography of artificial scenery, such as farm fields, orchards, gardens and architecture, may be considered "landscape" photography as well. Even the presence of man-made structures (buildings, roads and bridges, etc.) or art (such as sculpture) may be considered "landscape" if presented in artistic settings or appearing (or photographed) in artistic style. Further, landscape photography is typically of relatively stationary subjects—arguably a form of "still life." This tends to simplify the task, as opposed to photography of kinetic or live subjects. However, landscape photography often overlaps the activity of wildlife photography and the two terms are