You can begin your jungle trekking in the Kitulgala Rainforest at Kitulgala City following an exciting boat ride across the Kelani River. The hiking trails take hikers past small streams, boulders and hidden waterfalls, providing the perfect opportunity to cool off by taking a dip in the water before making the trek back. Whitewater rafting adventures in Kitulgala are a must-do for adventure seekers. You only need wet gear to begin your two-hour, five-kilometre rafting trip in the Kelani River with a paddle. Take a swim to unwind after rafting, then head back to shore. The location where The Bridge on the River Kwai was filmed in 1957 is visible to the public. While the original Kwai River bridge is still standing in Thailand, tourists can still see the remnants of the wooden bridge that director David Lean constructed for the explosive train scene. You can learn about the world of film history during an engrossing stroll to the site.