And the church steeple mixed with the tall buildings around the lake retains the antique charm in the modern city appearance. Statues and sculptures standing on the lakeside, swans and waterfowls floating on the sparkling blue waves, add to the unique beauty of Lake Alster and give people a sense of tranquility and leisure. The sails on the lake are dotted and drifting between the blue sky and green water, which makes the lake scenery bright and bright. Ulster Lake, known as the Pearl of Hamburg City, is a place of recreation, entertainment and rest for Hamburg citizens. Located in the center of the city, the Outer Lake is a paradise for sailors and rowers. Sailing crews are proud that the 160-hectare Lake (the deepest part is only 2.5 meters) is a man-made lake. It was built in the thirteenth century by the confluence of an Alster River and a stream that flows into it. These streams are still the obstacle runways of sailors'romance till today. Hamburg people and Hamburg tourists like to walk around Lake Ulster because it is the most valuable sightseeing program offered by hydrophilic green cities. In addition, Ulster Park around the lake provides a large number of places to stay, relax and play. Of course, there are cafes and restaurants around Lake Alster, where people can eat and drink while enjoying the beauty of Lake Alster, or relax themselves.