''It's A Marvel'': Video Shows India's First-Ever Underwater Metro Service In Kolkata
Prime Minister Narendra Modi is set to inaugurate India's first under-river metro tunnel built in Kolkata today. The Kolkata Metro extension, featuring the Howrah Maidan-Esplanade Metro section, includes the first transportation tunnel in India to pass under a major river, representing a critical milestone in the country's infrastructure development.
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