This Austrian postage stamp, issued in 1957, features the famous Semmering Railway winding through the rugged alpine landscape. Printed in violet and valued at 60 Groschen, it highlights one of Austria’s most celebrated engineering feats, the first mountain railway in the world to be declared a UNESCO World Heritage Site. The dramatic depiction of steep cliffs and viaducts reflects Austria’s pride in its alpine heritage and technical achievements. A sought-after issue in the "Landscapes and Monuments" definitive series, it appeals to collectors of European railway history, Austrian landscapes, and mid-20th century definitives.