Here is listed a few pages that I found helpful in my final project. They all deal with either photography in general or they are people's own showcases for their photographs of nature. Some of it is very stunning and I recommend you all to take a gander at these.

Short how to lessons
http://www.barbcollins.com/

Good site for diverse nature photos
http://www.mbay.net/~cgd/photo/photog.htm

Absolutely gorgeous work, very inspiring
http://www.lamartinaphotos.com/

Abstract Nature Photography
http://www.magma.ca/~shravan/abstracts.htm

Here are some other sites that may be of use.

ACTLab's home
http://www.actlab.us/

University of Texas' Home
http://www.utexas.edu/