Editor's note: One of America’s treasures, GTNP is different because the Tetons are relatively young mountains (around ten million years old), rough and jagged and adolescent-ish compared to the middle-aged Rockies and the soft, worn-down, elderly Appalachians. You don’t have to be an elite athlete to enjoy GTNP; while it offers plenty of adventure, you can also happily tour it by car. Or, of course, you can enjoy some exquisite Great Teton National Park wallpapers from the comfort of your couch!