A remote 894 square km of pristine forest that stretches all the way south into Nakhon Sawan province and west to Tak's Umpang district, Mae Wong is worth the effort if you want to get way out into the wilderness. While the park includes several waterfalls, the best require a two-night, three-day trek to reach. If you can manage that, the falls at Mae Gee crash over a 200 metre-high cliff, making it one of Thailand's tallest. Not quite as dramatic, Mae Rewa waterfall flows over a sloped rocky face into a wide pool that's great for swimming. Smaller falls and rapids can be found several km down a narrow, partially paved road that runs through a valley rimmed on either side by mountains covered in old growth jungle.