A UNESCO World Heritage site, Sinharaja Forest is a national park rich in biodiversity. The name Sinharaja translates to Kingdom of the Lion and it is the only virgin rainforest in the country. The trek through the dense forest intertwined with shrubs, vines, woody climbers and trees – it is one of the best in the country. In comparison to the other reserves in the world, Sinharaja is not so big however it is truly a fortune in terms of natural resources. You find endemic species including trees, insects, birds, reptiles, amphibians, and mammals. The number of elephants and leopards seen here are less than in other national parks in the country however the purple-faced langurs make up for that. Bird watching is popular at the reserve since out of the 26 endemic birds in the country, 20 are found here. A variety of reptiles can be seen here including the Green Pit Viper and Hump Nosed Vipers. One thing you need to watch out for is the clingy leeches!