Salt Lake City, Utah
Constructed in 1970 by American sculptor Robert Smithson, this piece of
art was constructed entirely of mud, salt crystals, basalt rocks, earth,
and water. The 1,500-foot-long counterclockwise coil is
located on the northeastern shore of the Great Salt Lake near Rozel
Point, and is only visible when the level of the Great Salt Lake falls
below an elevation of 4,197.8 feet.