Michael Heizer, Double Negative, 1969 Mormon Mesa, Nevada Double Negative is Michael Heizer's first prominent earthwork. Seen above from near the edge of the work, and below from space via satellite, Double Negative consists of two trenches cut into the eastern edge of the Mormon Mesa, northwest of Overton, Nevada in 1969-70. The trenches line up across a large gap formed by the natural shape of the mesa edge.
Walter de Maria, The Lightning Field, 1977 The Lightning Field (1977), by the American sculptor Walter De Maria, is a work of Land Art situated in a remote area of the high desert of western New Mexico. It is comprised of 400 polished stainless steel poles installed in a grid array measuring one mile by one kilometer.