Not far from the town hall, walk about tens of meters to the left to the Girl's Dike and the Arc de la Castle. In the small lake under the Girl's Dike, the swans swim quietly in the water, and many seagulls circle at low altitude. Many tourists sit under the white arcade next to the small lake, drinking a variety of drinks, while leisurely watching the swan swim in the lake. In the white arcade, in addition to restaurants, there are some brand specialty stores. Crossing the arcade, you will come to Lake Ulster. Lake Ulster is a lake in Hamburg, divided into two sizes by a bridge and dam, namely Lake Ulster outside and Lake Neuerster. In the middle of the lake, a large fountain kept spraying water columns upward, dancing under the breeze, shining against the blue sky and white clouds.