Early Religious history, Government, Economy, People and Tradition. History and Culture Information and Travel Guide. Vacation packages Book store. The territory of Croatia bridges the central European and Mediterranean worlds, and its history has been marked by this position as a borderland. More information on Croatia history. Environment: Croatia is indeed unique, not only for its crystal clear, clean blue sea, but also for a thousand years of different cultures that have replaced each other and sometimes assimilated in these areas. The Adriatic Sea is not only a deep gulf in the Mediterranean cut into the Continent of Europe thereby creating most economical trade route between Europe and the East, it is also the cradle of ancient civilizations.