Rijeka Dubrovačka is a ria to the north of Dubrovnik, Croatia, on the coast of the Adriatic Sea. The Ombla river flows into Rijeka Dubrovačka. The Franjo Tuđman Bridge spans it, carrying the D8 state road.
Wikipedia https://en.wikipedia.org/wiki/Rijeka_Dubrovačka
Coordinates 42°40'16.503" N 18°6'4.616" E