James Turrell is an artist primarily concerned with light and space. He is best known for his work in progress, Roden Crater. Located outside Flagstaff, Arizona, Turrell is turning this natural cinder volcanic crater into a massive naked-eye observatory, designed specifically for the viewing of celestial phenomena. His other works usually enclose the viewer in order to control their perception of light; a James Turrell skyspace is an enclosed room large enough for roughly 15 people. Inside, the viewers sit on benches along the edge to view the sky through an opening in the roof. He is also known for his light tunnels and light projections that create shapes that seem to have mass and weight, though they are created with only light.
In April 2009, The James Turrell Museum opened at the Bodega Colomé in the Province of Salta, in Argentina. It was designed by Turrell after Donald Hess the owner of the Bodega and owner of a few of Turell's works told him he wanted to dedicate a museum to his work. It contains 9 lights installation, including a skyspace (Unseen Blue), and some drawings and prints.