Witness the first sunrise in Thailand from Cha Na Dai Cliff overlooking the picturesque Mekong River and Laos. The national park earned its name from the numerous petroglyph arts estimated to be over 3000 years old. The national park also holds many natural features such as Soi Sawan Waterfall and Sang Chan or Long Ru Waterfall, the only waterfall in Thailand that flows through a hole in the cavern before plunging down into the pool below, and Sao Chaliang, a mushroom shaped sandstone formation.