Andong Tunnel Introduction
The Andong Tunnel, one of the must-visit military sites in Dongyin, features a long staircase leading into an enormous combat readiness tunnel that cuts through the central command area of Dongyin – Erchong Mountain. Constructed around 1971 during the Cold War, the military released the tunnel in 2002, after which the Matsu National Scenic Area Administration undertook renovations, and it was officially opened to visitors in 2004. The entrance to the tunnel sports a camouflage exterior and is located next to the training center. Upon descending the tunnel entrance, visitors encounter a steep slope and approximately 464 stairs, leading into the Andong Tunnel's intricate, branching pathways that unveil various wonders and connections throughout. The internal length of the Andong Tunnel that pierces through Erchong Mountain is about 300 meters and includes eight passageways along the corridor. Facilities like the commander's room, dormitories of different sizes, an operations room, an ammunition depot, washrooms, and even pigpens are found here, each directly connected to the seaside. The observation openings, situated on a cliff by the sea, were once gun emplacements but now serve as prime viewing platforms for appreciating the ocean, seagulls, and the fjord. From the tunnel's openings, rock formations are named after their shapes, such as "Indian Head" and "Puppy Head," making it worthwhile for visitors to explore. Visitors to the tunnel can see various original constructions that hold significant tourism value. Around April each year, migratory birds like the Black-tailed Gull and the Arctic Tern fly from Japan to nest and raise their young around the tunnel's entrance and nearby islands. The view from the observation platform showcases the azure sea and sky, peculiar rock formations, and flocks of seagulls, creating a breathtaking spectacle that attracts many bird enthusiasts each summer. Note: 1. A complete visit takes about 30 to 60 minutes, and the tunnel stairs are steep, so be mentally prepared for the ascent on the way back. 2. Please ensure to turn lights on and off when entering and exiting the tunnel. The tunnel is steep, and vehicles are not allowed inside! 3. Terns are very sensitive to noise, so please speak softly when birdwatching in the Andong Tunnel to avoid disturbing them.