Glenfinnan Viaduct

The Glenfinnan Viaduct is a railway bridge on the West Highland Line in the Scottish Highlands. It stands at the head of Loch Shiel, near the Glenfinnan Monument. The structure was built between 1897 and 1901 from mass concrete. It has 21 semicircular spans and crosses the River Finnan at 30 metres above the valley. The single-track line it carries is 380 metres long and curves gently across the landscape. The viaduct is recognised as Scotland’s longest concrete railway bridge. Its construction was overseen by Robert McAlpine, nicknamed ‘Concrete Bob’, who pioneered the use of mass concrete in difficult terrain. The project cost £18,904 and was completed ahead of the rest of the line. A local legend once claimed a horse fell into one of the piers during building, but later investigations found no evidence at Glenfinnan. The structure remains a vital part of the West Highland Line, connecting Fort William and Mallaig. Visitors to Glenfinnan see the viaduct rising above the loch and moorland. Trains pass regularly, including steam services in summer that draw large crowds. The Jacobite steam train, operated by West Coast Railways, is especially popular with tourists. The viaduct also appears on the Bank of Scotland’s £10 note and in the Harry Potter films. Nearby, the Glenfinnan Monument marks the spot where the Jacobite rising began in 1745. The surrounding hills and loch provide dramatic views of this engineering landmark.