Phae Muang Phi Forest Park, located in Mueang Phrae District, is a remarkable geological phenomenon created by water and wind erosion over tens of thousands of years. In the local dialect, "Phae" refers to a grove or scrub forest, while "Muang Phi" (Ghost City) conveys the eerie silence and the mysterious, jagged shapes of the earth. The area features earth pillars and cliffs in various shapes, such as mushrooms or sharp ridges, clearly reflecting the geological history of the Phrae Basin.