This is the length of some tunnels of different types in the world. The camera travels at full speed each of them for an idea of its length.

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🎵MUSIC: (Youtube Library)
On The Run - Doug Maxwell, Jimmy Fontanez
Half Pipe - Huma-Huma
Light Years Away - Doug Maxwell

📝SOURCES:
https://en.wikipedia.org/wiki/List_of...
https://en.wikipedia.org/wiki/List_of...
Central Yunnan Water Diversion Project - https://en.wikipedia.org/wiki/Central...

🟪Credits free 3D models:
Trains - cadnav.com