This is the big obvious tower above the road into Ghost Ranch. It overhangs on all sides. It is on the cover of the book Ansel Adams in the Southwest, which, I think, is out of print.
Getting There
It's above the road into Ghost Ranch. Before you reach the cluster of buildings that comprise the GR complex, there's a "frontage" road that heads north. Drive this to access Ghost Tower, Animas, and Mt EP.