Galle is a town situated on the southwestern tip of Sri Lanka, 119 km from Colombo and UNESCO World Heritage Site. Galle was known as Gimhathiththa before the arrival of the Portuguese in the 16th century, when it was the main port on the island. Galle reached the height of its development in the 18th century, during the Dutch colonial period. The major river is Gin River Gin Ganga which starts from Gongala Kanda and passing villages such as Neluwa, Nagoda, Baddegama, Thelikada, Wakwella and kisses the sea at Ginthota. In Wakwella over the river there is Wakwella Bridge which is the longest bridge in Sri Lanka.