City by Michael Heizer

City opened to visitors in 2022, approximately fifty years after Heizer began construction in 1972. It is located in the remote Garden Valley of Lincoln County, Nevada. Visits are limited and managed through a reservation system via the Triple Aught Foundation, which oversees the site.

Visits are by advance reservation only, arranged through the Triple Aught Foundation's official website. The site is extremely remote—roughly a two-hour drive from the nearest major services—and visitors must travel on unpaved roads, so a high-clearance vehicle is strongly recommended. Because capacity is very limited, reservations often book up far in advance.

City is over a mile long and ranks among the largest contemporary land-art works ever created, comparable in ambition to other monumental earthworks like Robert Smithson's Spiral Jetty on the Great Salt Lake. It comprises multiple complexes of mounded earth, concrete, and geometric forms arranged across the desert floor of Garden Valley, Nevada.

Construction spanned roughly five decades, beginning in 1972 and continuing until its public opening in 2022. Heizer, the son of archaeologist Robert Heizer, funded the project over the years through galleries, collectors, and grants. The extended timeline makes it one of the longest-running single-artist projects in modern art history.