"The museum's collection and calendar of exhibits is a little more daring than you might imagine, but the permanent installation of James Turrell's Knight Rise presents visitors with the biggest art jolt of all. The work, open to the public for free, consists of a circular bench beneath a luminous domed ceiling. An elliptical hole cut into the top of the dome contains a glimpse of sky. When observed in this manner, even the clearest desert sky seems to shift and pulse and fill thewindow with pure exuberant color. Come at dawn or sunset for the best (and often most solitary) viewing."