Kanneliya Rainforest Reserve, located in the Southern Province, is a lesser-known but richly biodiverse tropical rainforest. It's part of Sri Lanka's remaining lowland wet-zone forest system and is home to a large number of endemic species. The reserve features waterfalls, rivers, canopy layers, and a peaceful eco-atmosphere. Guided treks take visitors deep into forest paths to learn about medicinal plants, wildlife, and conservation efforts.