Located in south-west Sri Lanka, Sinharaja is the country's last viable area of primary tropical rainforest. More than 60% of the trees are endemic and many of them are considered rare. There is much endemic wildlife, especially birds, but the reserve is also home to over 50% of Sri Lanka's endemic species of mammals and butterflies, as well as many kinds of insects, reptiles and rare amphibians.

Sri Lanka's tropical rain forest, the Sinharaja is a UNESCO World Natural Heritage Site. One of the few virgin forests left in the world. Visitors are required to obtain permits from the Wildlife Department in order to visit this sanctuary. Streams, springs, rivers, waterfalls, leopard, monkeys, butterflies and moths, rare trees, valuable shrubs and medicinal herbs are all found within its green canopy. A trek along prescribed paths would provide nature lovers with a never to be forgotten experience of sights and sounds.

The largest mammal in the forest is the rarely spotted leopard, also infrequently glimpsed are the rusty spotted and wild fishing cats. Sambhur, barking deer and wild boar browse on the forest floor. The more common troops of purple-faced langur monkeys will chatter and move through the trees above you, but you're more likely to hear them than actually see them. There are also rats, shrews, giant squirrels, porcupines, civets, mongooses, venomous snakes, 20 species of birds and 45 species of reptiles!.