Sinharaja is Sri Lanka's last viable primary rainforest, a UNESCO World Heritage site that's been growing for 50 million years. It's dense, dripping, and deafening with bird calls. If you want to see endemic species like the Sri Lanka blue magpie or purple-faced langur, this is the only place in the country that delivers.
But don't romanticise it — this is a proper rainforest. Expect leeches, mud, and humidity that'll soak you through in minutes. The trails are rough, and a bad guide can ruin the experience. Most visitors stay at the edge in Kudawa, where lodges range from charming eco-cabins to tired rooms that need a renovation.
The smart move: book a lodge with a good reputation (Rainforest Eco Lodge is the standout), confirm your guide and tour price upfront, and go for at least two nights. One night feels rushed. Three is perfect for serious birders. And bring leech socks — you'll thank us.