Robert Smithson, Spiral Jetty (1970)
Great Salt Lake, Utah
Mud, precipitated salt crystals, rocks, water
1,500 ft. (457.2 meters) long and 15 ft. (4.6 meters) wide
Collection of Dia Art Foundation
Photograph: Gianfranco Gorgoni
© Holt/Smithson Foundation and Dia Art Foundation, Licensed by VAGA at ARS, New York