Great Salt Lake
Robert Smithson's sculpture Spiral Jetty is an example of an earthwork, which is art made from natural elements. The jetty, which was made from earth, rocks, and salt crystals from the site of the sculpture, extends off the shore into the Great Salt Lake. From the air, it looks like a large whirlpool. As often is the case with earthworks, Spiral Jetty, which was completed in 1971, has been reclaimed by nature and is no longer visible from the surface.