Glenfinnan Viaduct overlooking Loch Shiel is recognisable to muggles around the world from the Harry Potter films ... their seats on the Jacobite steam train, which doubled for the Hogwarts ...
If you can swing it, you should consider a ride on the train, even if you aren't a "Harry Potter" fan ... Line travels along the west coast of Scotland, through Loch Lomond & The Trossachs ...