The unique marine erosion landscape of Cai Pu Au is located at the northern end of Jian Guo Road in the northeastern part of Xi Ju Island, which belongs to Tian Wo Village. The surrounding natural landforms are characterized by typical granite conical shapes, with narrow, elongated granite veins radiating into the sea. After being eroded by seawater, this forms cliffs, dangerous reefs of various sizes, and layers of crashing waves, resulting in a highly diverse coastline. The distinctive marine erosion landscape is the most prominent geological feature of the Cai Pu Au Geological Park.
Before the completion of Qing Fan Deepwater Port, Cai Pu Au was the primary summer harbor for access to Xi Ju Island. In summer, southern winds can reach level 7 or higher, so both passenger ships and commercial vessels had to dock at Cai Pu Au. Additionally, due to the surrounding complex ocean currents and abundant fisheries, Cai Pu Au is not only an excellent location for shore fishing and shell collecting but also named for its rich production of purple laver. Every season, a large rock belonging to the Chen General Temple near the coast opens up for bidding. Only the winning bidder is granted the right to harvest the purple laver attached to the rock—a unique local custom in the Matsu Islands.
Currently, the outer area of Cai Pu Au is open to tourists for visits, but military personnel remain stationed there. Visitors can experience the joys and challenges of coastal stationing by following the instructions provided. Observing the "Blue Tears" in the abandoned wartime atmosphere of Matsu’s Xi Ju Island. The former observation platform in Cai Pu Au, due to its lack of light pollution, is an ideal spot for capturing the best nighttime view of "Blue Tears." Looking down from the platform, the glowing blue luminescence of the "Blue Tears" flickers as waves crash against the rocks along the shore, creating a mesmerizing spectacle.
Note: At night, the surrounding area lacks lighting and remains a military site with strong sea breezes. It is recommended to be accompanied by a local tour guide who is familiar with the region to observe the "Blue Tears" safely.
