When you approach Tiehan Fort from the road, you might spot an M42 anti-aircraft gun on the right, but there's no English sign, and you're confronted with a metal turnstile which is officially the exit. However, nothing happens if you squeeze under it…Above ground set in the trees are an artillery fort, the commander's office and an ammunition depot. Underground, you can see the recesses for 5 machine guns, 2 bedrooms, 2 ammunition depots, a 57mm anti-tank gun and a firefighting water storage area.