Land art or earth art is art that is made directly in the landscape, sculpting the land itself into earthworks or making structures in the landscape using natural materials such as rocks or twigs.
One of the major distinctions between Land Art and most of the art one sees in galleries is that Land Art is designed to evolve and eventually decay. Some works of art are quite ephemeral, existing only for a few hours or days, while others are deliberately exposed to erosion and wind so that they become distorted over time. Many artists document the creation process with art photographs and videos so that a record of their Land Art endures. Owning a record of art that existed only for a short time can be akin to owning the work itself: you are buying an actual piece of art history.