Editing Robert Smithson (section)

===''Broken Circle/Spiral Hill''===
{{Main|Broken Circle/Spiral Hill}}
[[File:Broken Circle - Spiral Hill, Robert Smithson - Q2867150 - 5.jpg|thumb|300px|right|Robert Smithson, ''Broken Circle/Spiral Hill'', Emmen, the Netherlands]]
In 1971 Smithson created ''Broken Circle/Spiral Hill'' in Emmen, the Netherlands<ref name="Tuchman">{{cite news|last1=Tuchman|first1=Phyllis|date=January 27, 2017|title=How Do You Sell a Work of Art Built Into the Earth?|work=The New York Times|url=https://www.nytimes.com/2017/01/27/arts/design/robert-smithson-earthwork-art.html|access-date=January 31, 2017}}</ref> as part of the Sonsbeek art festival. The subject of the 1971 Sonsbeek exhibition was ''Beyond Lawn and Order'' (Dutch: Buiten de perken). The ''Broken Circle'' earthwork was built in a quarry lake 10-to-15 feet deep. It was 140 feet in diameter, with the canal 12 feet wide, and built of white and yellow sand. The accompanying ''Spiral Hill'' is made of earth, black topsoil, and white sand, and is 75 feet in diameter at its base.<ref name="Hobbs" /><ref>{{cite journal |last1=Shanken |first1=Edward A. |title=Broken Circle &/ Spiral Hill?: Smithson's spirals, pata- physics, syzygy and survival |journal=Technoetic Arts: A Journal of Speculative Research |date=2013 |volume=11 |issue=1 |pages=3–14 |doi=10.1386/tear.11.1.3_1 |url=https://artexetra.files.wordpress.com/2009/02/shanken-smithson-2013.pdf|access-date=June 17, 2019}}</ref> The work is still being maintained and occasionally opened for visitors.