Spiral Jetty, Great Salt Lake, Utah. 2015.
Spiral Jetty is a piece of land art created in 1970 by Robert Smithson. It is located on the north shore of the Great Salt Lake in Utah, near Promontory Point, the site of the completion of the nation's first trans-continental railroad.
The spiral is constructed from black basalt, salt crystals and sand, and the shape stands out against the light colored sand and salt of the lake. After so nearly 50 years, beautiful thick salt formations have grown on the black rock, causing it to sparkle in the sunlight.
Visitors are allowed to walk on the formation when it is accessible (meaning the lake levels are low) and it is a beautiful, meditative experience.
In 2016, the Utah legislature voted to make Spiral Jetty one of two official state works of art.