1 Season
9 Episode
Richard Hammond's Big - Season 1 Episode 5 World's Longest Railway Tunnel
Richard ventures 2km beneath the Alps into the world's longest underground railway connection, the Brenner Base Tunnel, riding some giant machines!
- Year: 2020
- Country: United Kingdom
- Genre: Documentary
- Studio: Discovery
- Keyword: engineering, size
- Director:
- Cast: Richard Hammond