Robert Smithson is widely recognized as the pioneer of Land Art, known for his iconic earthwork, "Spiral Jetty," created in 1970.

Land Art primarily utilizes natural materials such as earth, rocks, water, and vegetation as its medium of expression.

Spiral Jetty, created by Robert Smithson in 1970, is an iconic Land Art project that involved the construction of a 1,500-foot-long spiral-shaped jetty in the Great Salt Lake.

Michael Heizer is the artist behind "Double Negative," a monumental earthwork located in the Nevada desert, consisting of two massive trenches carved into the landscape.

Walter De Maria's "Earth Room" (1977) transformed a New York City storefront into an immersive earthwork, filled with 250 cubic yards of topsoil.

Nancy Holt's "Sun Tunnels" (1973-1976) consists of four large concrete tunnels aligned with the solstices and equinoxes, located in the Great Basin Desert of Utah.

Michael Heizer's "Tree Mountain" (1977-1984) involved the planting of 11,000 oak trees in a grid pattern on a mountainside in Nevada.

James Turrell's "Roden Crater" is an ongoing earthwork project in Arizona, transforming a volcanic crater into a large-scale observatory and artwork.

Dara Birnbaum's "Desert Breath" (1997) involved the creation of a series of concentric circles in the Sahara desert using GPS technology.

Richard Long's "A Line Made by Walking" (1971) involved walking a straight line across the Sahara desert, leaving a temporary trace of his journey.

Agnes Denes' "Cornfield Labyrinth" (1982) involved the creation of a large-scale labyrinth in a cornfield in New York, inviting viewers to walk through its intricate paths.

Christo and Jeanne-Claude's "The Pont Neuf Wrapped" (1985) involved temporarily wrapping the Pont Neuf bridge in Paris with fabric, creating a striking visual spectacle.

Andy Goldsworthy's "Stone Cairns" (1994-ongoing) involves the creation of a series of stone cairns along remote coastlines, using locally found stones.

Maya Lin's "The Vietnam Veterans Memorial" (1982) is a black granite wall inscribed with the names of American soldiers who died in the Vietnam War.

Marco Brambilla's "Atacama Desert Lines" (2016) involved the creation of large-scale geometric lines using salt crystals in the Atacama Desert, Chile.