Grand Teton National Park, Wyoming, United States.

Grand Teton National Park lies just south of Yellowstone, so it's often overlooked, but it is one of the most beautiful and most well-run National Parks I've ever been to. I took this photo from inside my tent (while in my sleeping bag) in one of the campgrounds managed by the National Park. Instead of cramming as many sites as possible into the campground, all of the sites were spacious, had great views, and were first-come first-serve. More expensive than most, sure, but I think the payoff is well worth it!