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https://postojnsko.si/travel/wp-content/uploads/2023/05/predjama-castle-what-to-do-sights-visit-postojna-scaled.jpg25601707POSTOJNA IS THE CRADLE OF KARSTOLOGY DECORATES BY UNIQUE KARTS WONDERS. Here, where the Postojna Pass has been connecting the Mediterranean and Central Europe since the ancient times, the nature still creates wonders of the karst. Postojna is a true treasure of world-renowned attractions with its wonderful and mysterious underground world as well as unique...