Robert Smithson's "Spiral Jetty" is a large-scale earthwork created in 1970 using black basalt rocks and salt crystals.

The Circle Game is a land art project created by Agnes Denes in 1982, consisting of a series of concentric circles planted with different types of grass.

Walter De Maria's "Lightning Field" is a land art installation consisting of 400 stainless steel poles arranged in a grid pattern.

The Musical Forest is a land art project created by John K. Melvin in 1990, consisting of trees planted in the shape of musical notes.

James Turrell's "Roden Crater Project" is a large-scale land art installation that involves transforming a volcanic crater into an observatory.

The Mounds of Mystery is a land art project created by Robert Smithson in 1968, consisting of a series of mounds created by piling up earth and rocks.

Michael Heizer's "Double Negative" is a land art installation consisting of two large trenches cut into the desert floor.

The Green Labyrinth is a land art project created by Klaus Littmann in 1989, consisting of trees planted in the shape of a labyrinth.

Nancy Holt's "Broken Circle & Spiral Hill" is a land art installation consisting of a broken circle of rocks and a spiral hill.

The Love Forest is a land art project created by John K. Melvin in 1993, consisting of trees planted in the shape of a heart.

Nancy Holt's "Sun Tunnels" is a land art installation consisting of four large concrete tunnels aligned with the solstices and equinoxes.

The Spiral Forest is a land art project created by John K. Melvin in 1992, consisting of trees planted in the shape of a spiral.

Michael Heizer's "Rift" is a land art installation consisting of a large crack in the desert floor.

The Cross of Trees is a land art project created by John K. Melvin in 1994, consisting of trees planted in the shape of a cross.

James Turrell's "Star Axis" is a land art installation consisting of a large crater with a tunnel leading to an underground chamber aligned with the stars.