Kitulgala is the adrenalin-sports capital of Sri Lanka. White-water rafting, jungle trekking, bird watching and cave exploration are popular among all visitors .The town’s other main claim to fame is that David Lean filmed his 1957 Oscar-winning epic Bridge on the River Kwai here. You can walk down a pathway to the filming site along the banks of the Kelaniya River. A few kilometers from Kitulgala is a large cave system where the 28,500-year-old remains of early humans were discovered.