Thangassery is a place of historical importance situated 5 kms. away from Kovalam town. The churches here are pretty old, having been established in the 18th century. The chief attraction of the place is the lighthouse, built in 1902. The 144 ft lighthouse stands as a sentinel, warning seamen of the treacherous reefs of Thangassery. The construction of a fishing harbour is in progress. Thangassery was an enclave of the Portuguese, Dutch and British in succession. The remnants of the Portuguese and Dutch forts still exits.