The Semmering Railway Viaduct is a remarkable structure located in Austria, part of the Semmering Railway, which was completed in 1854. This viaduct is known for its impressive engineering, featuring multiple arches that span the scenic landscape of the Semmering Pass. It was one of the first mountain railways in the world and is recognized as a UNESCO World Heritage Site. The viaduct is approximately 1,200 meters long and stands at a height of 40 meters. It was designed to facilitate travel through the challenging terrain of the Alps, making it a significant achievement in railway construction. The Semmering Railway remains a popular route for both tourists and train enthusiasts.