(Also known as land art, earth art or environmental art). Outdoor art that is produced by altering the natural landscape, usually on a large scale. Prominent practitioners include Nancy Holt, Michael Heizer, Robert Smithson, Walter De Maria, and Andy Goldsworthy. See also: effigy mounds, geoglyph. Web resource here. Video here.

James Turrell. Sky Garden Crater. Near Skibbereen, Ireland. 1992.