Guishan Tunnel

Guishan is a strategic coral outcrop at the north end of the Hengchun Longitudinal Valley Plain. It has long been fortified by successive colonial regimes and was likely visited by Charles Le Gendre in 1867, prior to formal Qing administration of the area. Numerous Japanese colonial era fortifications modified by the ROC after their arrival can still be found scattered across the mountaintop, and extensive tunnels, some of them partly blocked by landslide debris, weave beneath the surface.