Complex sentence: Other cities attracting tourists include Gdańsk, Poznań, Szczecin, Lublin, Toruń and the historic site of the German Auschwitz concentration camp in Oświęcim.
Split into simpler sentences: Other cities attracting tourists include Gdańsk, Poznań, Szczecin, Lublin and Toruń. The historic site of the German Auschwitz concentration camp is located in Oświęcim.