The Wyżyna Krakowsko-Częstochowska (Kraków-Częstochowa Upland) is also known as Polish Jura or Polish Jurassic Highland. It is a hilly landscape with Jurassic limestone rocks which is karstified. 220 caves are known in the area, also many other karst features and limestone rock formations. The karst area is located between the cities Kraków and Częstochowa, hence the name. A huge part is protected by the Ojcowski Park Narodowy (Ojcow National Park).