If you have never seen Once Upon a Time in the West, you should definitely rent it. It has one of the best directors, a great cast, a phenomenal music composer, and an excellent story. Personally, Jason Robards (he plays Cheyenne) is my favorite.
This is the filming locations then and now. Much has changed between 1968 and 2009 (the date on the video), but you can also see that despite the buildings being gone, not too much is new either. Enjoy!
Thanks to HerveAttia on YouTube for the video. To visit his blog go to http://onthesetoutw.blogspot.com.