The tower is situated in a region defined by extensive columnar basalt formations dating back millions of years.
The name 'Sanxian' refers to local folklore surrounding the three immortals, a common cultural reference in Taiwanese coastal shrines.
The location is positioned to overlook the Daguoye Columnar Basalt area, which is a major geological site nearby.
The tower's design incorporates architectural elements meant to withstand the high-salinity environment and strong winter monsoon winds typical of the Penghu Islands.
Sanxian Tower is a distinctive coastal landmark located on the small island of Xiyu in the Penghu archipelago. It serves as a navigational beacon and an observation point offering views of the surrounding Taiwan Strait. The structure is integrated into the rugged basalt landscape characteristic of Penghu's volcanic geology. It sits near the southern end of Xiyu, a region historically significant for its military fortifications and traditional architecture. The tower provides an elevated vantage point to observe the tidal currents that converge around the island's coastline. It is maintained by the Penghu National Scenic Area Administration. Visitors often access the site while touring the island's coastal highway route.
The base of the tower facing the sea provides a clear shot of the horizon and the unique basalt coastal shelf.
Bring high-factor sun protection, as the site has minimal natural shade and high ultraviolet exposure.
Wear footwear with strong grip, as the terrain surrounding the tower can be uneven and rocky.
Visit during low tide to explore the exposed coastal rock platforms visible from the tower's vantage point.
Avoid climbing on the unstable basalt cliff edges near the tower, as the rock is prone to erosion and crumbling.
