Pa Hin Ngam National Park () is a national park in Chaiyaphum Province, Thailand. "Hin ngam" means "beautiful stone", "pa" means "forest". The park got its name from the strange rock formations at the west end of the park. Erosion has carved several large rocks into striking and unusual shapes.
In 1985, the Tep Satit Forestry Department first surveyed the area, long popular with locals, and recommended its protection. In October 1986, Pa Hin Ngam Park was created, covering 10 km<sup>2</sup> around the strange rock formations which gave the park its name. In 1993, the Forestry Department of Thailand conducted a more thorough survey including the surrounding area, and recommended that it become a national park. The national park covering 62,437 rai ~ was created on 19 September 1994, which was officially gazetted in 2007.
The park is at the boundary of the Dong Phaya Yen Mountains and the Khorat Plateau. The steep cliff at the 846 m high Sut Phan Din viewpoint affords a view into a valley of the Sonthi River and the Sap Langka Wildlife Sanctuary. The name "Sut Phan Din" (à ¸ªà ¸¸à ¸Âà ¹Âà ¸Âà ¹Âà ¸Âà ¸Âà ¸´à ¸Â) means "end of land", reflecting the steepness of the cliff. This cliff also marks the watershed between the Chao Phraya and the Mekong rivers.
Pa Hin Ngam National park has the area that is full of green 112 square kilometers, has many kinds of plants, and the place to see the beautiful plants in the national park. There are two places that have different kinds of plant, the first is the place where you also can see the view that has a lot of trees called "Sut Phaendin" and the second is the place that has the most beautiful flower in the national park called "Bua Sawan Field". Most of the area is a green field and it looks fertile because of many kinds of trees and they can be grown for the whole year. There are two different kinds of plants, the tropical plant and the dry evergreen plant. Also, these plants are protected by the officer of the national park for keeping them safe because the plants can be easy to destroy. However, the second place called "Bua Sawan Field" has more beautiful plants than Sut Phaendin.
Bua Sawan Field has only a plant called Siam tulip locally called "Dok Kra jiao". But it grows only during the rainy season.