The project of water secrecy would be to invest in the major landscape of the Smjnica, with the aim of better managing visitors and improving the level of knowledge of all stakeholders, all for the sustainable use of the natural heritage. More specifically, the investment investment aims to increase visitors’ accessibility to the ZK Slujča room, the extension of the visit zone and, therefore, the duration of the visit by visiting the visitor to the variety of the ZK Spray content through the newly developed programmes of the organised visits and the interpretative board.