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

Land Art is characterized by its use of natural materials, emphasis on the relationship between art and nature, and the creation of large-scale artworks in natural settings.

"Double Negative" by Michael Heizer is a Land Art project that involved digging a trench across a desert in Nevada.

Walter De Maria's "Lightning Field" is a Land Art installation in the New Mexico desert, consisting of 400 stainless steel poles arranged in a grid pattern.

Nancy Holt's "Sun Tunnels" is a Land Art project in Utah, consisting of four large concrete tunnels aligned with the solstices and equinoxes.

James Turrell's "Roden Crater" is a Land Art project in Arizona, involving the transformation of a volcanic crater into a large-scale artwork.

Robert Smithson's "Spiral Jetty" is a Land Art project in the Great Salt Lake, Utah, consisting of a 1,500-foot-long spiral jetty made of black basalt rocks.

Richard Long's "A Line Made by Walking" is a Land Art project where he walked a straight line across a field, leaving a visible trace of his path.

Andy Goldsworthy's "Cairns" is a Land Art project in the Scottish Highlands, consisting of a series of stone cairns arranged in various patterns.

Christo and Jeanne-Claude's "Wrapped Reichstag" is a Land Art project where they wrapped the Reichstag building in Berlin with silver fabric.

Christo and Jeanne-Claude's "The Gates" is a Land Art project where they installed 7,500 saffron-colored gates in Central Park, New York.

Christo and Jeanne-Claude's "Surrounded Islands" is a Land Art project where they surrounded 11 islands in Biscayne Bay, Miami, with pink fabric.

Christo and Jeanne-Claude's "Running Fence" is a Land Art project where they installed a 24-mile-long fence across the California coastline.

Maya Lin's "The Vietnam Veterans Memorial" is a Land Art project in Washington, D.C., consisting of a black granite wall inscribed with the names of American soldiers who died in the Vietnam War.

Michael Heizer's "Double Negative" is a Land Art project in the Nevada desert, consisting of two large trenches dug into the earth.