Phu Phan National Park

Phu Phan National Park () is a national park in Sakon Nakhon and Kalasin provinces, Thailand. This isolated park covers a wide jungle area in the Phu Phan Mountains of Isan.
Geography.
Phu Phan National Park is located south west of Sakon Nakhon town and about north of Kalasin. The park's area is .
History.
In the past, the isolation of the park's location led to its use for cover by some military groups. During World War II, the Seri Thai resistance fighters used the Tham Seri Thai cave for weapons storage. And in the 1970s the People's Liberation Army of Thailand (PLAT) used the area as a hideout.
Attractions.
Viewpoints in the park include the west-facing Nang Mern Cliff and the Lan Sao Aee plateau.
The park has numerous waterfalls, including the multi-stage Kam Hom Waterfall, also Kreng Ka-arm and Pree-cha Suk-san waterfalls.
Some of the park's unusual rock formations include the grilled-snake-shaped Khong Ping Ngu and the long Tang Pee Parn natural stone bridge.
The park also contains the ruins of a Khmer temple, Phra That Phu Pek, accessed by ascending around 500 steps.
Flora and fauna.
The park consists of seasonal tropical forest, with a large dry dipterocarp forest component. Other forest tree types here are dry evergreen and mixed deciduous.
Animal species include barking deer, monitor lizards and slow loris. Monkeys and elephants are also found in the park.