The mountains have shaped American industry and transportation:
: The bedrock is primarily sandstone and quartzite, which are extremely resistant to weathering. Outdoor Recreation & Rail Trails alleghenies
: A sharp, massive escarpment that serves as the Eastern Continental Divide , separating the Mississippi River and Chesapeake Bay watersheds. : A flat, well-maintained trail between Ohiopyle and
: An 17.6-mile trek through history featuring two dark, damp, and abandoned tunnels (Sideling Hill and Ray's Hill) left behind when the highway was rerouted. : A flat
: A flat, well-maintained trail between Ohiopyle and Confluence that follows beautiful rapids and connects to the broader Allegheny Highlands Trail .
: A massive protected area in Pennsylvania offering thousands of miles for hiking, camping, and wildlife watching . Historical and Industrial Legacy
: Areas like Dolly Sods Wilderness feature high-altitude-esque plateaus with stunted trees, heath, and sphagnum bogs typically found in much more northerly latitudes.