This route is considered the "official" route to Una NP. Officially, however, it was closed due to construction work. But none of them could be seen. The "super" gravel route was mostly a pushing route with a packed touring bike. A few signs were still visible. Since Europe has loosened a few euros, but now everything is decaying, including the path, deep erosion channels prevent reasonably good progress.
But I saved the entrance fee for that.