The St Anthony’s Channel with the Krka estuary, rich in flora and fauna, belongs to the ecological network Natura 2000 Krka Delta, which covers an area from the Skradin Bridge to the fortress at the exit of the channel. As a natural protected area, the St Anthony’s Channel is part of the significant landscape Channel – Port in Šibenik, within which cultural and natural heritage are combined in a synergistic manner. Therefore, the buffer zone of St Nicholas' Fortress does not divide the city of Šibenik and its port from this exceptional monument under the UNESCO protection; rather, it creates a connection between them thanks to the natural and cultural sights located in the St Anthony's Channel. This protected area is managed by the Public Institution Nature of the Šibenik-Knin County.