The town of Slunj was first mentioned in a written document by the chronicler Johann Weikhard von Valvasor who reported about the fortified town of Slunj, a bridge and a mill in 1689. The first illustration of the mills of Rastoke dates back from 1789. It was a copper engraving that has been added to a description by Belsazar Hacquet. At the end of the 19th century, Stjepan Širola wrote the following about this place: ""The surroundings of Slunj are downright romantic […]. They are crowned by the magnificent waterfalls of the Slunjčica river by which even not outspoken nature lovers will be captivated. Indeed, Slunj with its romantic surroundings and the silver waterfalls of the Slunjčica represent a true nature gem astonishing even to foreigners.""