Na Yung–Nam Som National Park, National park in northeastern Thailand
Na Yung–Nam Som National Park is a protected area in northeastern Thailand, sitting at the point where Udon Thani, Loei, and Nong Khai provinces meet. The terrain consists of forested hills, sandstone cliffs, and stream-fed valleys that drain toward several small rivers originating inside the park.
The area was first protected in 1975 and has remained largely undisturbed since then. It is currently being prepared for a formal reclassification as a national park, which would expand its protected boundaries.
The park is most comfortable to visit in the cooler months, roughly from November through February, when the heat eases and the trails are drier. Wearing sturdy shoes and carrying enough water are practical essentials, especially on longer walks leading to viewpoints or waterfalls.
A small cave sits next to the Pha Daeng sandstone cliff, and it was once used by a monk for meditation. It can be reached along the trail that also passes two waterfalls before arriving at the viewpoint.
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