Old growth European Beech forest in Biogradska Gora National Park, Montenegro

Forrester Island Wilderness in the U.S. State of Alaska

One aspect of the Yellowstone National Park.

Sheepeater Cliff, Yellowstone: a columnar basalt cliff formed by rapidly cooling lava.

Wilderness or wildland is a natural environment on Earth which has not been much disturbed by humans.

"The most intact, undisturbed wild natural areas left on our planet—those last truly wild places that humans do not control and have not developed with roads, pipelines or other industrial infrastructure".

Wilderness areas can be found in reserves, estates, farms, conservation areas, ranches, National Forests, National Parks and even in urban areas along rivers, gulches or any undeveloped areas. These areas are important for the survival of species, biodiversity, ecology, conservation, solitude, and recreation.

Wilderness is deeply valued for cultural, spiritual, moral, and aesthetic reasons. Some nature writers believe wilderness areas are vital for the human spirit and creativity.