Anawilundawa Sanctuary can be recognized as one of the 6 RAMSAR wetlands in Sri Lanka, The sanctuary spreads through 1,397ha lying between the costal line and the Negambo – Putlam railway line.
This wetland consists of six large man made tanks and three peripheral tanks interconnected to create a complex irrigation system. The larger tanks are Pinkattiya, Maradansola, Anawilundawa, Mayyawa, Surawila and Vellawali. The Anawilundawa Wetlands is known as a heaven for bird watchers, with over 150 species of birds; both resident and migratory. Resident and endemic bird species can be seen throughout the year.
Anawilundawa wetland sanctuary is fast developing into one of Sri Lanka ‘s most important ecotourism attractions and it is specially good for birds watching, Trekking and boat rides.