Sun Tunnels is an earthwork composed of four concrete cylinders, each measuring eighteen feet in length and nine feet in diameter, installed in an X-shaped configuration in the Great Basin Desert. The work situates the human body within vast geological and astronomical systems, foregrounding perception as a primary sculptural medium. The four structures are precisely aligned to frame the rising and setting sun during the summer and winter solstices. Each tunnel is perforated with patterns corresponding to the constellations Draco, Perseus, Columba, and Capricorn.

Twelve photographs of the horizon line correspond to twelve separate angles of sight, a foreshadowing of what will be the views from Holt’s majestic earthwork, ​Sun Tunnels. The photographs are mounted on paper and demarcated with cardinal direction, as well as the geographical landmarks featured within them. The drawing is both a preparatory tool and an allusion to Holt’s conceptual meditations; the lines radiating from the center suggest an infinite path of sight, while the photographs fragment the view, limiting us to a constructed experience of the landscape.