Wang Silalang, or Grand Canyon Pua Unseen, is a stunning natural phenomenon formed by the movement of the Earth's crust and the flow of water. This water eroded the rock until it became a cylinder through which a river flows for a length of 400 meters.

Suitable for a winter visit from October to December

Key features and special characteristics: There are bizarre rock formations and a small, gorge-like rock face through which clear water flows; ideal for walking and photography.

Getting there: From the city of Nan, take Highway 1081 towards Pua District. The route is approximately 60 kilometers long and the journey takes about 1 hour.

Best time to visit: A visit is possible all year round, but during the dry season the water is clear and inviting for swimming, while the rainy season or its end offers a green, natural atmosphere (beware of the different currents during the rainy season!).

Address: Baan Hua Nam Subdistrict, Silaeng District, Pua District, Nan Province

Visits possible: Can be visited all day.