Beigan North Sea Tunnel Introduction
Artificially carved and a masterpiece of engineering, the Beihai Tunnel began construction in 1968 as part of the "Beihai Project" for strategic needs in the Matsu region. Numerous "underground docks" were excavated specifically for the docking of guerilla vessels. Today, after being released by the military, it has become a unique "battlefield landscape" in the Matsu area. A visit to the Beihai Tunnel is essential; otherwise, it feels like you haven't been to Matsu at all. The Beihai Tunnel is located along the Tieban coastline, penetrating deep into the mountains with waterways intersecting in a "井" (well) shape. The waterway is 18 meters high, 10 meters wide, and 640 meters long, with water levels reaching 8 meters at high tide and 4 meters at low tide. The entire trail is 700 meters long and takes about 30 minutes to complete, but entry depends on the tides, allowing access only during low tide. This underground tunnel can accommodate over a hundred landing craft and was considered a high-difficulty engineering project. Two divisions, three infantry battalions, one engineer battalion, and a mixed unloading vehicle company were mobilized to work day and night, completing the project in 820 workdays. Due to the rudimentary construction equipment at the time, granite walls were excavated by hand, relying on explosives and manual labor, which resulted in several casualties. The project was so monumental and challenging that it can be described as a work of divine craftsmanship. In the tumultuous times of the past, the Beihai Tunnel attempted to serve as an underground dock for logistical support. Today, as people walk through the deep tunnel, the magnificent rock walls and dim, floating reflections evoke awe among visitors. Note: The site is open for visitors, but entry during the day requires coordination with tidal changes. Please pay attention to the tidal time differences! Nighttime Rowing: A Great Place to See the Blue Tears In recent years, due to the discovery of "blue tears" and the limited light pollution at the entrance of the Beihai Tunnel, it has become one of the hotspots in Nangan for observing blue tears. Taking a rowing boat into the tunnel, slowly searching for the faintly glowing halos, is an experience worth exploring. Note: The blue tears are a natural phenomenon and cannot be predicted. Please refrain from using flash photography. For safety reasons, standing up or changing seats during the boat ride is prohibited.
