
horseshoe curve
Horseshoe Curve is a famous railway track located in Pennsylvania that uses a series of curved tracks shaped like a horse's shoe. Built in the 19th century, it allows trains to smoothly ascend or descend steep terrain by gradually changing elevation through a series of large, connected bends. This design reduces the effort needed for trains to climb hills and helps maintain steady speed, making rail travel safer and more efficient. The curve is a notable engineering achievement and a historic landmark, illustrating how careful planning can overcome challenging landscapes for transportation.