If you’re looking for a 7-day Scotland itinerary by train, this guide is for you. Starting and ending in Glasgow, this itinerary takes you through the Highlands on one of Scotland’s most scenic railways.    In one week, you’ll swap city streets for island castles, journey past lochs and wide moorlands and stay in a remote Highland village along the way.    Take a day trip to the Isle of Arran, with its coastal walks, castles and distilleries. Venture north to Fort William, set at the foot of Ben Nevis, the UK’s highest mountain. Continue to Glenfinnan and see...