It was declared a national park on June 12, 1981, with clearly defined areas for a reservoir and year round green jungle in the Tanaosri Ranges which are the origins of many rivers.
The area is also rich in flora and fauna and has an 18-level waterfall named Namtok Tho Thip. About 54 kilometers from the park office on the Sai Wang Won – Namtok Tho Thip route, there is a viewpoint affording magnificent views of misty mountains in the morning and suitable for bird and butterfly watching.
Rafting along the Phetchaburi River takes some 6 hours, passing rapids and several smaller rivers.
Established: 1981 (28th national park of Thailand)
Tourist Attractions: Birdwatching, Buterfly Watching, Caves, Mountains, Cliffs, Viewpoints, Lakes, Waterfalls, Wild Animals
Famous as: The largest national park of Thailand Province: Phetchaburi and Prachuap Khiri Khan, Western Thailand