The Spiral Jetty State is Utah, which is a western U.S. state known for its natural diversity of landscapes, ranging from arid deserts with sand dunes to lush green valleys. It is also home to world-famous national parks such as Zion, Bryce Canyon, and Arches. The Spiral Jetty is a large sculpture located in the Great Salt Lake, created by artist Robert Smithson in 1970. It is one of the most iconic works of land art in the world.