Glasgow to Mallaig
From the bonny banks of Loch Lomond to the wildness of Rannoch Moor, this is one train journey for which you won’t need a book. In summer the sea lochs to the west glitter turquoise, and in winter Ben Nevis looms white and forbidding to your right. A particular highlight is the climb up to Glenfinnan over the spectacular viaduct made famous by the Harry Potter films.
Journey time 5 hours 15 minutes, from £33.70. More information here.