Earthworks

http://www.earthworks.org/links.html

Nancy Holt, The Sun Tunnels
http://www.npr.org/templates/story/story.php?storyId=5500934
http://www.clui.org/clui_4_1/ludb/sites/UT3126.html

Walter De Maria, The Lightening Field
http://www.lightningfield.org/

James Turrell, Roden Crater
http://www.pbs.org/art21/artists/turrell/clip1.html
http://www.npr.org/programs/morning/features/2001/feb/010208.turrell.html

Robert Smithson, Spiral Jetty
http://www.npr.org/templates/story/story.php?storyId=4464074
http://www.robertsmithson.com/