Location: Raichak Lighthouse is located at Diamond Harbour in West Bengal. Distance: The lighthouse is located at a distance of about 43 km from Kolkata. History: The Raichak lighthouse was built in 1883 and is one of the oldest lighthouses in the country. Description: The Raichak lighthouse is a white, cylindrical tower that is about 47 meters in height. The lighthouse is equipped with a flashing light that is visible for a distance of about 18 nautical miles.