Wilpattu National Park (Willu-pattu; Land of Lakes) is a park located on the island of Sri Lanka. The unique feature of this park is the existence of "Willus" (Natural lakes) - Natural, sand-rimmed water basins or depressions that fill with rainwater. The park is located 30 km west Anuradhapura and located 26 km north of Puttalam (approximately 180 km north of Colombo). The park is 131, 693 hectares and ranges from 0 to 152 meters above sea level. Nearly sixty lakes (Willu) and tanks are found spread throughout Wilpattu. Wilpattu is the largest and one of the oldest National Parks in Sri Lanka. Wilpattu is among the top national parks world renowned for its Leopard (Panthera pardus kotiya) population. The Leopard population in Wilpattu is still not yet known.
Flora-There are many types of vegetation to be found in Wilpattu; Littoral vegetation, including Salt grass and low scrub monsoon forest with tall emergents, such as Palu (Manilkara hexandra), and Satin (Chloroxylon swietenia), Milla (Vitex altissima), Weera (Drypetes sepiaria), Ebony (Disopyros ebenum) and Wewarna (Alseodaphne semecapriflolia).
Fauna-31 species of mammals have been identified within Wilpattu national park. Mammals that are identified as threatened species living within the Wilpattu National Park are the elephant (Elephas maximus), Sloth bear (Melursus ursinus), leopard (Panthera pardus kotiya) and water Buffalo (Bubalus bubalis). Sambhur, spotted deer, mongoose and shrew are more of Wilpattu's residents. The most common reptiles found in the park are the Monitor Lizard (Varanus bengalensis), Mugger crocodile (Crocodylus palustris) and Common cobra.