India’s first ever underwater metro was recently inaugurated in Kolkata, This underwater service is part of the Howrah Maidan-Esplanade section of the Kolkata Metro, spanning 16.6 km beneath the Hooghly River.
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Connecting Howrah and Salt Lake, the twin cities of Kolkata, the metro route features three underground stations. The underwater metro covers a 520 m river stretch in just 45 seconds! The underwater metro opened for the public from March 15.
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