This is the minor part of Lake Pikku-Vesijärvi (literally Lake Little Vesijärvi). It is connected to the major part through a narrow strait over which there is a bridge. There is a group of loudspeakers around this part. In the middle, there is a fountain with several nozzles capable of ejecting water about 5-10 m up into the air and a set of lights of different colors. All these parts make up an integrated system used to put on a water and light show complete with classical music in the summer.
This is the major part of Lake Pikku-Vesijärvi. Behind the line of trees on the other side is Lake Vesijärvi. There is a bridge over a canal that connects the lakes.