The dense forests of this section of the Appalachian Mountains, located in Eastern Pennsylvania, are more than just a beautiful escape into the natural world. They also help to protect and supply clean drinking water millions of people, which is why the heavily forested region has recently been classified by Congress as ecologically significant.

In Pennsylvania, hikers, bicyclists and bird-watchers will recognize The Highlands by their local names, including Haycock Mountain, the slopes of Mine Hill and Rattlesnake Hill; and the watershed areas of Cooks Creek, Rapp Creek, Tinicum Creek and Tohickon Creek.