Varkala Tunnel is an old tunnel built in 1867 by Sir T. Madhava Rao who was also the Dewan of Travancore during that time. This took about 14 years to build the tunnel that runs a little over 900 feet and allowed traders to halt before proceeding with their journey towards Thiruvananthapuram. This historic inland waterway is a great example of the Colonial era architecture in the region.
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