The Nangan Beihai Tunnel is an extremely important and remarkably well-preserved military heritage landscape in the Matsu area. Over the past two decades, through the collaborative efforts of the Matsu National Scenic Area Headquarters (Matsu Headquarters) under the Tourism Administration, Ministry of Transportation and Communications, the Lienchiang County Government, and tourism industry partners, a balance between landscape preservation and tourism development has been achieved through various initiatives—such as landscape conservation, universal accessibility improvements, and the provision of distinctive water-based recreational activities. These efforts have driven the transformation of the military landscape, creating a friendly, safe, and culturally rich tourism environment.
The land at the entrance of the Nangan Beihai Tunnel was designated as private property through general land registration in 2001. To ensure the integrity of landscape development, the Matsu Headquarters has continuously sought to negotiate with the landowner for land purchase or long-term lease. Recent negotiations conducted by the headquarters included an in-person discussion at the Matsu Headquarters office on April 23, 2026, and a telephone discussion on June 1. Furthermore, written notices were sent to the landowner on June 3 and July 6, expressing the willingness to purchase or lease the land at a reasonable market price in accordance with the law, facilitating subsequent improvement projects for tunnel safety, universal accessibility, and smart tourism services. However, no written reply has been received to date.
On June 28, the landowner enclosed the private land, barring public access ever since. In accordance with Article 15 of the Constitution of the Republic of China (Taiwan), which guarantees the protection of people's property rights, the headquarters respects this action. As for whether installing the enclosure conflicts with the management mechanism of Matsu's military heritage landscape or land use zoning regulations, and whether the right-of-way for established public roads applies, the headquarters will hold further consultations with the Lienchiang County Government.
Although the current enclosure prevents the public from reaching the area around the screen wall at the tunnel entrance, visitors can still enter and exit the tunnel freely via the barrier-free walkway. Interior tunnel walkway access (subject to tides) and unique water activity experiences remain open as usual. The Matsu Headquarters welcomes domestic and international travelers to visit Matsu in person to enjoy non-motorized, eco-friendly, and slow-paced water activities inside the transformed military tunnel—admiring the majestic rock formations by day and experiencing the dreamlike Blue Tears by night.