National Park entrance fee: 40 baht for adults, 20 baht for children. Khao Chamao – Khao Wong is the source of the upstream of Rayong. There are many wild animals. And there are beautiful nature such as waterfalls, cliffs, caves, beautiful natural scenery. Inside there is a welfare shop serving coffee, drinking water and snacks, which is open daily from 8:00 a.m. to 4:00 p.m. Here, the highest peak is "Khao Chamao", 1,024 meters above sea level. Many streams such as Khlong Raok, Khlong Phlo, Khlong Hin Phloeng, etc.