Longitude Zero – Meridian Line marker on Ceiling of Foot Tunnel

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Slipping beneath the bustling city, the Greenwich Foot Tunnel holds a secret. Atop its tiled ceiling, almost unnoticed, a brass marker designates Longitude Zero. This marker in the Greenwich Foot Tunnel isn’t the world-famous Prime Meridian line at the Royal Observatory. It’s a subtle echo, a reminder of the powerful forces that converge just a short distance away. The Greenwich Foot Tunnel, opened in 1902, was designed by Sir Alexander Binnie. It stretches 1,215 feet under the Thames, connecting Greenwich and Millwall. Imagine the workers who traversed this tunnel daily, their footsteps echoing on the glazed tiles. They were likely unaware they walked beneath a marker mirroring the Prime Meridian line. This brass marker serves as a quiet tribute to Greenwich’s role as the home of time and navigation. It’s a hidden gem for those who venture beneath the surface, a reminder that even in the most unexpected places, the world’s coordinates can be found.

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