The project was presented by Krka National Park director Kresimir Sakic and project designer Hrvoje Vukic.
The 462-metre Tibetan-style footbridge will be the third longest in the world and the second longest in Europe. It will connect the medieval fortresses Necven and Trosenj and provide a direct experience of the landscape and intact nature.
Vukic said that it would be a glass-bottomed walkway suspended 140 metres above the river.
"This is the crown of our development projects and visitor infrastructure ... It will provide renewed momentum for future development of this area and will add to its attraction without endangering nature," Sakic said.
Local government officials said that this project would mean a lot for the development of their municipalities, especially the tourist industry.
Construction is expected to start within the next two years, depending on the speed of preparation of the necessary documents and licences.