Yung Thong Waterfall located at Ban Sawang, Mu 2, Tambon Na Yoong, King-Amphoe Na Yung is a waterfall on the ridge of Phu Phan and Phu Ya Ou, where a stream flows through the steep rock cliff. Yung Thong Waterfall is three metres high and composed of water beautifully cascading amongst the stones, especially during the rainy season when it thunders down in torrents among the lush, green flora. Located 103 kilometers from Amphoe Mueang, the route to the waterfall passes through Amphoe Ban Phue and Amphoe Nam Som. Upon reaching Amphoe Nam Som, there is a junction from Nam Suem Village, proceed on that route for seventeen kilometers in order to reach the junction that leads to the Reserve Park. The route is part of the project of the Office of Accelerated Rural Development, aimed at speeding up the development in the rural area which is in good condition and can be used all the year round.

Yung Thong Waterfall is 103 kilometers from the province. Located in Na Yung Nam Som National Park, it is a three-layer waterfall surrounded by number of trees and valleys.