Chorzów is a city on the Rawa River in Upper Silesia and part of the Upper Silesian Metropolitan Union, Poland's largest conurbation. Originally called Königshütte in German and Królewska Huta in Polish (both meaning "Royal Iron Works"), it was renamed Chorzów after a merger with a village of that name in 1934. Chorzów used to be one of the most important cities of the Upper Silesian Industrial Region with extensive industry in coal mining, steel, chemistry, manufacturing, and energy sectors. As heavy-industry establishments were either closed or scaled down, or restructured and modernized, the city has been evolving towards service economy. Chorzów is nationally famous for its Silesian Central Park, complete with amusement grounds, a cable line railway, a zoo, a sports stadium, and the largest and oldest planetarium in Poland (pictured). (Full article...)