Pingsi Township, situated at the upper reaches of the Keelung River in northeastern Taipei County, covers an area of 71.34 square kilometers. The Township is elongated in shape with many hills and valleys, and very few dotted plains in between. It is surrounded by mountains; an isolated green mountain range filled with phytoncides. Due to the northeast monsoons, rainfall is particularly heavy in the winter, add to this the geological impact of erosion from the Keelung River and its tributaries and it has created many natural treasures such as sharp rocks, cliffs, waterfalls, and pot holes, earning Pingsi the nickname “Waterfall Township”.