7. Grand Canyon National Park, AZ
One of the most beautiful sites in the world is also one of the most affordable. The Grand Canyon can be very busy so book early. To save the most money book your stay at the end of August when you will have better luck finding deals or stay in one of the many campgrounds. Also, avoid pricey car rentals by taking advantage of the free shuttle bus service offered. It is best way to get around the South Rim.