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https://postojnsko.si/travel/wp-content/uploads/2023/05/haasberg-castle-hosperk-visit-postojna-2-scaled.jpg25601440The ruins of the former Baroque mansion rise above the gorge of the Unica River in the southern part of Planina Field. The Hošperk (Haasberg) castle was built by the Eggenberg princes at the beginning of the 17th century, at the foot of an old medieval castle that was destroyed by an earthquake. At that...