The 1355-meter-long Qionglin Tunnel is Kinmen's largest civil defense tunnel. Crossing Qionglin Village underground, it has 12 entrances and exits that lead to important facilities in the village as well as the gun fortress just outside the village. The command center for the tunnel is right beneath the Qionglin Village Office. The entrance to the tunnel is at the Village Office.Built in 1976, Qionglin Tunnel was regularly used by villagers to shelter from falling bombs during the civil war. It's even equipped with a well in case of long term staysDepending how long you take to look at the displays inside, it takes about 20-30 min to walk the entire length of the tunnel. Once you reach the exit, take time to enjoy strolling back to the Village Office where you started, this time above ground.