Secrets of the West is a wonderful site which contains magnificent and inspirational travelogues for anyone that wants to chase the beauties of the American Southwest. There is only one catch with it. You have to be able to read german language, although the images presented are internationally well understood even without translation. :-)
The American Southwest is a comprehensive guide to the national parks, national monuments and natural landscapes of American Southwest, West and Northwest. This is a nice site to get started with some great ideas. The shots that go along with the text are mediocre, unfortunately. Otherwise it would be THE site.
Photofolia.net is a neat virtual sandbox to exchange photographs, critiques, comments, workshops, and much more. It is a perfect learning and teaching environment in every aspect that has to do with photography and our world. Take a peek and I know that you will not be disappointed in signing up and playing around!