The City Walls
A trip to Dubrovnik wouldn't be complete without walking the circuit of its City Walls. From here, you not only get a gorgeous view of the Adriatic, you also get a real sense of quite how powerful and canny the Ragusa republic was, fending off Venice and the Ottomans for centuries. It's up to you which direction you decide to walk in, but ideally you'll finish up at the Pile Gate at the opposite end of Stradun.