The Glenfinnan Viaduct is a concrete railway viaduct consisting of 21 arches on the West Highland Line in Glenfinnan, Lochaber, Highland, Scotland. It was built around 1897 and sits atop Loch Shiel, providing great views of the Glenfinnan Monument and the loch.
The train line connects Fort William and Mallaig.
The viaduct has been used in numerous films and television series, including 3 of the Harry Potter movies.