Yongshi and Tiehan Forts are twin fortifications on Xiao Kinmen that are connected by subterranean tunnels. It's just one of many old military installations-turned-tourist attractions that you can find all over Kinmen and its smaller neighbour.
odd things to do in kinmen
KINMEN BIG GORILLA (金門大猩猩)
If you're tired of visiting the usual tourist sights, why not seek out something a little... stranger? Like this gorilla's head in an abandoned military site.
Taiwan Trails and Tales 