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In page Odesa:

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The city currently covers a territory of 162.42 km2 (63 sq mi).[1] The population density for which is around 6,139 persons/km2. Sources of running water in the city include the Dniester River, from which water is taken and then purified at a processing plant just outside the city. Being located in the south of Ukraine, the topography of the area surrounding the city is typically flat and there are no large mountains or hills for many kilometres around. Flora is of the deciduous variety and Odesa is known for its tree-lined avenues which, in the late 19th and early 20th centuries, made the city a favourite year-round retreat for the Russian aristocracy.[citation needed]