Set in a relatively small area of land (at least as far as national parks go), this park occupies the hilly area between Nang Thong beach and Khao Lak beach, and it's worth paying the 100B entry fee to explore for a day.
Aside from a picturesque white sand beach and another more rocky beach that are both great for sunsets, the park also features a couple of impressive waterfalls — Ton Chongfa to the north and Lamprao to the west, on the other side of Phet Kasem Rd.
Of the two, Ton Chongfa is both easier to reach and more stunning with water cascading from multiple levels of cliff, the highest of which is around 200 metres high.
The national park also offers camping for 225B including tent, and simple bungalows with rock hard beds between 800 and 2,000B depending on size. The park is open from 8:30 to 16:30 daily.