Mountains can be a hiker's paradise with maintained trails ranging from short leg-stretchers to strenuous treks. But hiking is not the only activity do be done on mountains. Camping, fishing, and wildlife viewing are a few other popular activities. Most of these activities can be done with little to no charge at all. Most national parks like the Great Smoky Mountains in North Carolina offer ranger guided programs. So pack a good pair of hiking shoes and head out to one of the many beautiful mountains waiting to be explored.