A couple people mentioned Robert Adams as an influence in the thread. He has a 40 year retrospective up in Denver coinciding with the release of the new 3 volume opus book set by Yale University Art Gallery. The exhibit schedule is here.

I know he is not everyone's cup of tea. He was my friend and mentor in the early 80's when I was in graduate school. He was perhaps my most poignant critic (much of which I rejected) and he taught me allot. He is IME the brightest guy I have ever met in photography and I have known a few like Van Deren Coke and Beaumont Newhall. This exhibit is exhaustive, 225 prints shows all of his best work. I believe he is at his best when he doesn't over think his images-when he just feels them.

Anyway if you are a fan or just curious you should check it out.

There is also a very nice Motherwell exhibit up too on another floor.