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Richard Hammond's Big!: World's Longest Railway Tunnel

Richard Hammond's Big!: World's Longest Railway Tunnel

Richard Hammond goes behind-the-scenes of the world's longest underground railway connection to uncover how hi-tech equipment helps engineers blast through solid rock to create a cutting-edge train line over a mile beneath the earth's surface.

2026-06-12 09:53:00 +0000 UTC2026-06-12 10:47:00 +0000 UTC(54m)