2. Yellowstone National Park, WY
With jaw dropping scenery and warm western hospitality Yellowstone National Park is a must see. Yellowstone is best known for the Old Faithful geyser, which is spectacular, but there are also 1,000 miles of hiking trails, 67 mammals and free ranger programs. To get the most out of your budget, stay in a campground which offers many comforts such as showers and laundry and plan to do your own cooking while there.