Liu's new fort was laid out in two parts: a barracks area and a gun emplacement area. Over the entrance to the barracks, a carved inscription reads Haimen Tianxian, which you could read as a natural fortress guarding the gate to the sea. It also gives the site its other name. As you walk, you will find the stone gate and walls, barracks remains, gun positions and fortifications, all built into the slope. Visitors also point to an old well, an old tomb, replica cannons, and the east and north batteries. The north battery has the best views, looking out over Keelung Harbor. The trail is fairly rustic and loops back to the entrance conveniently, but the ground can be wet and slippery, so go on a dry day if you can. Butterflies are common, and there is a broad lawn that makes a pleasant picnic spot. Getting here is easy. Many Keelung buses stop at the Haimen Tianxian stop, and the nearby Yizheng Park makes a good companion visit if you want more military history.