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. 🢂MY WEBSITES🢀 🔓JOIN: 📷Instagram: 🐦Twitter: 🙂Facebook: 🎵MUSIC: (Youtube Library) On The Run - Doug Maxwell, Jimmy Fontanez Half Pipe - Huma-Huma Light Years Away - Doug Maxwell 📝SOURCES: Central Yunnan Water Diversion Project - 🟪Credits free 3D models: Trains -