This Overview captures Spiral Jetty, an earthwork sculpture by Robert Smithson, consisting of a 1,500-foot-long (460 m), 15-foot-wide (4.6 m) counterclockwise coil jutting from the northeastern shore of the Great Salt Lake in Utah, USA. Smithson reportedly chose this site because of the vibrant colors of the water (salt-tolerant bacteria and algae thrive here in 27% salinity) and its connection with the primordial sea.41°26'15.4"N, 112°40'10.4"W