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The bay is bordered by the districts of Katajanokka, Kaartinkaupunki, Ullanlinna and Kaivopuisto. The waterway leading to the South Harbour is 9.6 metres deep. The most critical point on the waterway is the Kustaanmiekka strait, with a width of 80 metres. The waterway has a speed limit of 30 km/h, except for the Katajanokka area, which has a speed limit of 10 km/h. Helsinki is situated on a superlative natural harbor. The coast of Finland is surrounded by thousands of small islands, and Helsinki is hidden behind these islands. Helsinki's harbour is an important focal point of the city's urban environment. Waterbuses leave from Helsinki's municipal dock for tourist attractions in the surrounding islands. A huge outdoor produce market is located along side Helsinki harbor. The huge ships that you see carry people, mostly to Sweden and back are always prominent in Helsinki's harbour. Also, seen is the beautiful Helsinki Cathedral. Ella sent me this lovely card.