Geography and urban development of Dresden past 60 years has made Dresden the fourth largest urban area in Germany after Berlin, Hamburg, and Cologne. The most important river in Dresden is the Elbe river, the only navigable body of water to flow through the city. There are also a number of tributaries such as the river Weißeritz. The nearest German cities are Chemnitz (80 km to the southwest), Leipzig (100 km to the northwest) and Berlin (200 km to the north). The Czech capital Prague is about 150 km to the south; the Polish city of Wrocław is about 200 km to the east. There are
Shrinking cities were significantly affected by the weak economic situation they were left in after the fall of socialism. The reunification of European countries yielded both benefits and drawbacks. German cities like Leipzig and Dresden, for example, experienced a drastic population decline as many people emigrated to western cities like Berlin. Hamburg in particular experienced a population boom with record production yields in 1991, after the unification of Germany. Conversely, Leipzig and Dresden suffered from a failing economy and a neglected infrastructure. These cities were built to support a much larger population. However, both Dresden and Leipzig are now growing again, largely