Introduction to Karst and Geology of Croatia.- The Dinaric karst system in Croatia.- Underground karst morphology (speleology).- Caves in Croatia - Caves in the central part of Dinaric karst.- Caverns found and explored during construction work in the Dinaric Karst of Croatia.- Caverns found and explored during construction of road tunnels in Istria and the Gorski kotar region.- Caverns found and explored during the construction of road tunnels in Lika and Dalmatia regions and the city of Rijeka.- Caverns found and explored during the construction of bridges, viaducts, roads and railroads.- Caverns found and explored during the construction of airports and in quarries.- Particularly interesting and rare occurrences in caves of the Dinaric Karst in Croatia.- Cave speleometry in the Dinaric Karst of Croatia.- Research Methods.- International activity of speleologists from Croatia.-
