Land Art
Art is not confined to being indoors, paint on a canvas, or commercial. Some of the most beautiful works of art take place naturally in nature, like snowflakes or reflections off of a shimmering lake at sunset. It should be no surprise, then, that land art is a popular expression of the rejection of commercial art and its methods. Land artists are typically focused on environmental and sustainability issues as well as accessibility of art to everyone.
Maya Lin (the designer of the Vietnam Memorial in Washington DC, USA) created a piece on the University of Michigan campus which combines elements of earth and water, nature and art. The grass covered waves that she created crest at 5 and 6 feet high. It is located in a popular part of camus and was designed to complement the building next to which it sits. It is not hidden away from patrons and was designed to be appreciated from the ground, rather than an aerial view, and welcomes visitors to meander through over the undulating earth.

Maya Lin, Wave Field, 1996, The University of Michigan, Ann Arbor, MI, USA
Part of the nature of land art is its transience: land cannot be permanently manipulated without much maintenance. Water tables, vegetation, and weather all want to pound the land back into its natural form, which is why making it accesible to human interaction can be so important. If the art will only hold its design for so long, then people only have a finite amount of time to enjoy and experience the piece. Some land art is best experienced from an aerial view, which limits the exposure of the art to those who can afford to charter a ride in a plane.
Jarosław Koziara, Land Art IV, Eastern Europe, http://koziara.art.pl/
Some artists prefer to create their art in secluded areas, compounding the relationship of the art to its natural surroundings. Robert Smithson created his Spiral Jetty in a remote area of the Great Salt Lake in Utah. It is difficult to access and there is nothing else around to draw tourists, besides a harsh landscape and a private view of the lake. The piece is made that much more meaningful by its solitude, however. The jetty can be experienced from the ground and, being made from rocks, has held up to the weather and the water well. It is said, however, to look better in photos than it does in person. It was actually submerged underwater for quite some time, but when the water level went down again in 1999, it was unmistakeable the the sculpture had weathered the storm well. The primary difference between how it looks now and how Smithson created it is the color of the rocks. Smithson started with black rocks, but when the water receded it became clear that nature preferred the rocks to be white.

Robert Smithson, Spiral Jetty, 1970, the Great Salt Lake, Utah, USA, http://www.diaart.org/sites/page/59/1380
Land art not only allows for a physical interaction with art, but also to experience a natural reaction. The materials and features of the art change with time, reinforcing the theme of the power of nature. It makes the viewer appreciate natural materials in their outdoor element and reminds us that sustainability and environmental protection are crucial to art and life alike.