Kanneliya-Dediyagala-Nakiyadeniya is a forest complex in southern Sri Lanka. This is the last large remaining rainforest in Sri Lanka other than Siharaja. This forest is one of prosperous fauna zone in south Asia. It’s spread over 101.4km area. This is situated about 35km towards Northern western from Galle town. This forest provides good security to many of rivers in southern Sri Lanka. And also this rain forest is a main water source which filled up “Nilwala” & “Gin”.