Outdoor art that is produced by altering the natural landscape, usually on a large scale. Also known as land art, earth art and environmental art. Prominent practitioners include Nancy Holt, Michael Heizer, Robert Smithson and Andy Goldsworthy. See also: effigy mound, geoglyph. Web resource here. Video here.
James Turrell. Sky Garden Crater. Near Skibbereen, Ireland. 1992.