Speleology
As a true Karst region, Croatia is full of caves. The most famous and most magical are the Modra Špilja [Blue cave] on Biševo and the Zmajeva Špilja [Dragons cave] on the island of Brač.
The caves in Papuk and in the Kordun, Lika, Dalmatia and Zagorje regions are open to visitors who have no experience and can enjoy the various forms of the stalactites and stalagmites. The most attractive caves are found in Istria, Gorski kotar and on Medvednica and for real lovers of the underground we recommend Veternica near Zagreb, Cerovačke spilje [Cerovac cave] near Gračac and Lukina jama [Lukina cave] on Velebit.