gateway istanbul marmaray rail tunnel_00013902
gateway istanbul marmaray rail tunnel_00013902

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    World's deepest submerged tunnel

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World's deepest submerged tunnel

An ambitious project, the Marmaray tunnel, will provide the first underwater rail connection between Europe and Asia.

World's deepest submerged tunnel

An ambitious project, the Marmaray tunnel, will provide the first underwater rail connection between Europe and Asia.