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Horseshoe Curve (Pennsylvania) - Wikipedia
Visit the Railroaders Memorial Museum & World Famous Horseshoe Curve
Altoona’s Horseshoe Curve: A Must-See for Train Lovers
World Famous Horseshoe Curve
Home [www.railroadcity.org]
Railroad Horseshoe Curve National Landmark | visitPA
Exploring the Horseshoe Curve Near Altoona - PA Bucket List
Horseshoe Curve Railfan Guide
Horseshoe Curve (Pennsylvania): A World-Renowned Landmark
World-Famous Horseshoe Curve - Explore Altoona