Taiwan's most important geographical feature is the Chungyang Shanmo or the Central Mountain Range. The range stretches 167 miles of the island's length and was formed by ancient tectonic movement and volcalnic activity. More than 200 of the island's peaks are at least 9,843 feet tall. The tallest peak in Taiwan, Yu Shan or Jade Mountain is 12,959 feet tall. Many deep valleys and gorges have been formed over time due to heavy rainfall. On one side of Taiwan's coast are many cliffs and on the other coast there are lots of plains. They have a lot of earthquakes, typhoons, and hurricanes.