Walking up the incline of the 854-foot East Alpha Tunnel, the visitor experiences an intense round glow at the end of the tunnel. As visitors come to the end of the keyhole-shaped tunnel, they realize that the opening to the sky is an ellipse created by cutting a cylinder on an inclined plane. This skyspace will also include a bronze stairway leading up to the floor of the crater. James Turrell is one of the most celebrated American artists working today. Born in California in 1943, he grew up with an enduring love of aviation and the sky, as well as a fascination with light. His Quaker background also substantially formed his approach to life and art, with its emphasis on silent access to the "light within." From age six, Turrell was urged by his grandmother to "go inside and greet the light" at Quaker meetings. In the early 1960's, Turrell studied perceptual psychology at Pomona College, taking additional classes in other scientific disciplines, such as mathematics, geology and astronomy.