Jungly Erawan National Park offers a soothing counterpoint to some of Kanchanaburi’s emotionally charged historical attractions, and the picturesque seven-tiered Erawan Falls are the star attraction. The water cascades down the mountains in a serene setting, surrounded by lush vegetation and limestone mountains. A scenic hiking trail leads up to the top of the falls (look out for thieving monkeys along the way), and the turquoise pools are a lovely spot to take a refreshing swim on a hot day. Dip your feet in the water, and you might feel fish gently nibbling at your toes.
Keep an eye out for other wildlife in the national park, including elephants, gibbons, and king cobras. (You’ll want to be wary of that last one.) If you’re up for a bit of exploration, check out the park’s Tham Phra That Cave. You can wander through four cavernous rooms and admire the ancient stalagmites and stalactites. Try to arrive earlier in the day to beat the tour buses.