Bill Rau likes to visit a spot in Utah’s Book Cliffs. He doesn’t want you to know where it is, but he sure wants you to know how beautiful and wild it is. The place north of Interstate 70 is the subject of his black and white photograph “Storm’s Light,” which is among 50 images selected for a juried exhibit to open Wednesday at the Natural History Museum of Utah. The show, Utah Wilderness 50, commemorates the 50th anniversary of President Lyndon B.