 Pigs are commonly bred, often also cows and chickens.Kampinos National Park is one of Poland's largest national parks and is popular with tourists making day trips from Warsaw to hike among the park's primeval forests, sand dunes, and marshland.The main cultural centre of the region, and, alongside Kraków, in all of Poland, is Warsaw, which is home to dozens of theatres, the National Philharmonic, the National Opera House, the National Library, the National Museum, Centrum Nauki Kopernik, Muzeum Powstania Warszawskiego, Temple of Divine Providence, and the Sanctuary of Blessed Jerzy Popiełuszko.