Tour the eastern tunnel entrance of the Metro Tunnel
40:58
Metro Tunnel Q&A with tunnelling expert Paul Thomas
9:37
Arden Station tour
46:16
Megaproject: Singapore's Deep Tunnel Sewerage System | Tomorrow City | Part 1/3
48:48
MEGA TUNNEL MACHINES - Drilling, Digging & Blasting | Full Documentary
45:08
Dirty Great Machines - Tunnel Boring Machines | Technology Documentary | Reel Truth. Science
44:02
National Geographic Megastructures MRT Malaysia Urban Diggers
20:02
Eppenberg SBB Railway Tunnel - From installation to the breakthrough
4:55