Watch Great British Railway Journeys Season 2 Episode 24 Online
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- COUNTRIES: United Kingdom
- Subtitles: English
Michael investigates one of the great geological mysteries of the 19th Century, the parallel roads of Glenroy. Plus, he finds out how the Victorians put a weather observatory on the top of Ben Nevis and takes a steam train across one of the most spectacular viaducts in Britain at Glenfinnan