Wyoming: Yellowstone National Park

Price: $15 to enter on foot, bicycle or skis

Location: Northwest Wyoming

There are many things to do at Yellowstone National Park besides look at the geysers. Yellowstone is perfect for biking, especially during the fall on its pre-set cycling routes. Come winter, the park is ideal for cross-country skiing. Whether you're on foot, bike or skis, you'll only have to pay $15 to enjoy the scenery.