If you like the photographer Ansel Adams, this is the place for you. It's free, it's not crowded and 75 of his original photographs, all signed, are exhibited. I enjoyed leisurely walking through and reading quotes by him on the wall.
However the exhibit is a walkway to the staff offices. Most of the time I was walking through, someone was in the staff lunchroom beating on a block of frozen ice. It was very distracting. Other people were stomping up and down the stairs and, I don't know, it felt like the exhibit was really an afterthought to them instead of a point of honor and pride.