Alleghenies < Android >

: The Allegheny Portage Railroad was a 19th-century marvel that used inclined planes to haul canal boats over the mountains.

The mountains have shaped American industry and transportation: alleghenies

: 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. : The Allegheny Portage Railroad was a 19th-century

: The bedrock is primarily sandstone and quartzite, which are extremely resistant to weathering. Outdoor Recreation & Rail Trails alleghenies

: 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.