Tennessee: Great Smoky Mountains National Park
42/50The Smokies are so nice, they made the list twice, and the Tennessee section of the GSMNP is the epitome of autumn. The park's rolling hills are crisscrossed with hiking paths and scenic drives that are seemingly all enveloped by spectacular traces of color. The campgrounds are plentiful and you may even make friends with some hikers tackling the legendary Appalachian Trail.