The Glenfinnan Viaduct is a magnificent railway bridge located in the Scottish Highlands, in the United Kingdom. It spans the River Finnan and is part of the West Highland Line, which runs from Glasgow to Fort William.

The Glenfinnan Viaduct is best known for its appearance in the Harry Potter film series, where it is featured as the Hogwarts Express. The viaduct has become a popular tourist destination for fans of the books and films, and is considered one of the most iconic and recognizable landmarks in Scotland.

The viaduct was built in 1897 and is over 100 years old. It is made up of 21 arches, each of which spans over 30 meters (98 feet). The viaduct is 384 meters (1260 feet) in length and stands 30 meters (98 feet) above the River Finnan.

Visitors to the Glenfinnan Viaduct can enjoy breathtaking views of the surrounding scenery, including the River Finnan and the hills and mountains of the Scottish Highlands. The viaduct is also a popular spot for hiking, bird-watching, and other outdoor activities.

The Glenfinnan Viaduct is easily accessible by train, and visitors can take the West Highland Line to reach the viaduct and enjoy the scenic journey through the Scottish Highlands. There is also a visitor center located near the viaduct, which provides information about the history of the viaduct and the surrounding area.