One of the world’s great fortified cities, Dubrovnik, Croatia, is unforgettable, from your arrival there to every moment you spend sheltered within the impressive defensive walls of the Old Town, drinking fine Croatian red wine, exploring ancient churches, admiring unique doorways, and popping into one of its museums. To get a different perspective of this unmistakable city, I went upstairs and took a 1.2-mile walk atop the walls that kept Dubrovnik safe for centuries. Read about it >