State Topography: Allegheny Mountains run southwest to northeast, with piedmont and coastal plain in southeast triangle; Allegheny Front a diagonal spine across the states center; northwest rugged plateau falls to Lake Erie lowlands
Location: 40.276N, 076.884W
5 Largest Cities: Philadelphia, Pittsburgh, Allentown, Erie, Upper Darby Twp
Travel Planning Tips Travel Planning Tip. A few hours of inconvenience could mean free airline tickets, complimentary meals, and even hundreds of dollars!
Travel Planning Tip. A few hours of inconvenience could mean free airline tickets, complimentary meals, and even hundreds of dollars! 
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