A year ago I purchased an annual pass for the U.S. National Park Service, (left) and made it a point to hit as many places as I could during the life of the pass. I wanted to get out and experience more of the natural world around me, as well as learn about the history of important events and places that I maybe didn't know about before I purchased my pass. Some of the places I had visited before, like Rocky Mountain National Park (above)here in Colorado, but overall I'd give it the big ol...