File:USGS National Map viewer after GNIS finding Kittaning Gap, Pennsylbania near Altoona, PA and showing the PRR Horseshoe Curve.png
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![File:USGS National Map viewer after GNIS finding Kittaning Gap, Pennsylbania near Altoona, PA and showing the PRR Horseshoe Curve.png](https://upload.wikimedia.org/wikipedia/commons/thumb/2/22/USGS_National_Map_viewer_after_GNIS_finding_Kittaning_Gap%2C_Pennsylbania_near_Altoona%2C_PA_and_showing_the_PRR_Horseshoe_Curve.png/800px-USGS_National_Map_viewer_after_GNIS_finding_Kittaning_Gap%2C_Pennsylbania_near_Altoona%2C_PA_and_showing_the_PRR_Horseshoe_Curve.png?20160507182526)
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