Jiao Lung Waterfall is the tallest measured waterfall in Taiwan, with a sheer plunge of 600 m. It is located on a cliff of Mount Da Ta in Alishan Township, Chiayi County. Its closest settlement is the small hamlet of Fengshan (豐山村). Predominantly seasonal, it has been known to have much reduced flow just several days after rain. Although a road leads up the canyon to Fengshan, the waterfall is extremely difficult to reach during full flow. Immediately after a typhoon, the waterfall is in full flow. However, the high flows also wash away the crossings and bridges of the stream, disconnecting Fengshan from access. After just several days or even hours, the waterfall decreases noticeably in volume. This is because the falls is located on a steep and short drainage that drops 1300 m in its 4 km run, which amounts to an average gradient of 325 m per kilometer, or 820 ft per mile.