Spiral Jetty is an earthwork sculpture by Robert Smithson, consisting of a 1,500-foot long, 15-foot anti-clockwise coil jutting from the shore of the Great Salt Lake in Utah, USA. Smithson reportedly chose this site because of the vibrant colours of the water (salt‑tolerant bacteria and algae thrive here in water with 27% salinity) and its similarity to the Earth’s ancient seas.
This image is taken from ‘Where We Design’ - my favorite chapter of our book OVERVIEW - which is currently 47% off (!!!) on Amazon US with the code ‘BOOKGIFT17’ here: