The Sai Yok National Park, which extends as far as the Burmese border, encompasses the former railway workshops, including the remains of the Japanese army camp and sections of the track. The rope bridge spanning the Khwae Noi, in the heart of the park, boasts a fine view of the Sai Yok Noi waterfalls. At the base of the bridge you can also rent a boat to explore the caves dug out of the surrounding cliffs, which are home to tiny bats, known as the "Khun Kitti" or "pig's nose" bat.