Sun Tunnels (1973-76), Great Basin Desert, Utah
"Three years after graduating, she married fellow environmental artist Robert Smithson in 1963. Holt began her artistic career as a photographer and as a video artist. This involvement with photography and camera optics are thought to have influenced her later earthworks, which are “literally seeing devices, fixed points for tracking the positions of the sun, earth and stars.” Today Holt is most widely known for her large-scale environmental works, Sun Tunnels and Dark Star Park. However, she has created site-specific environmental works in public places all over the world. Holt has contributed to various publications, which have featured both her written articles and photographs."