The entrance to the Old City and home of the statue of Dubrovnik's patron saint, St. Blaise. There's a bridge near the gate.
Wikipedia (Croatian) https://hr.wikipedia.org/wiki/Vrata_od_Pila
Address Gradska Vrata Pile 20000, Dubrovnik, Croatia
Coordinates 42°38'30.394" N 18°6'25.557" E