2. Cuyahoga Valley National Park, Ohio, U.S.
Situated along the Cuyahoga River, Cuyahoga Valley National Park is celebrated for its waterfalls and hilly terrain. The park features displays of pastoral farming and historical exhibitions that paint a picture of life in the region during the nineteenth century. Many visitors come to experience the Cuyahoga Valley Scenic Railroad tours that offer breathtaking views. A great place to bike or hike, this Midwest national park is definitely worth exploring.