Horse Shoe Bend, west., Bonine, R. A., Pennsylvania Railroad, Pennsylvania, Allegheny Mountains, Horseshoe Curve National Historic Landmark (Pa

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Photo credit: © Artokoloro / Alamy / Afripics
License: Licensed
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Keywords: ., allegheny, bend, bonine, curve, historic, horse, horseshoe, landmark, mountains, national, pa., pennsylvania, railroad, shoe, west