Introducing Phu Phan National Park
This national park remains relatively undeveloped and isolated. It's no surprise that the area once provided cover for the Seri Thai resistance fighters in WWII and People's Liberation Army of Thailand (PLAT) guerrillas in the 1970s. The former used Tham Seri Thai as an arsenal and mess hall. The 664-sq-km park is now a stomping ground for barking deer, monitor lizards, slow loris, many monkeys and a few elephants.
There are two main areas to visit. Near the visitor centre there are nice views at Nang Mern Cliff and you can climb down a further 1.5km to Lan Sao Aee plateau, which is even better for sunsets. Nam Tok Kam Hom, a stretch of four petite waterfalls, is 8.5km north of the visitor centre, at a wild bend in the road called Khong Ping Ngu Curve – named after the stacked shape snakes make when put on a skewer for grilling – that has Thailand's largest kilometre pillar. Water only runs from August to October. Between these two places, far from the highway, is the seldom-visited natural rock bridge, Tang Pee Parn.
Accommodation options include campsites and six four-person bungalows.
Buses to the visitor centre cost 25B and take 45 minutes.