Of all the walled cities in the world Dubrovnik has to be one of the finest. The wall surrounds the old city and is approximately 2 Km. in length. Walking time takes about an hour, which allows ample time for photographs.
Be aware there are several steep staircases, so if walking is an issue or a heart condition bothers you, perhaps pass on this attraction.
The summer sun is very hot and hats are a must, as well as plenty of sunscreen. The cost to walk the wall is 8 Euros and although there are ways of sneaking on you will more than likely be asked several times for your ticket.
PHOTOGRAPHY TIP: A wide angle lens will serve you best otherwise shoot 4 or 5 panoramas and stitch then together in Photoshop. Photos of the red roofs are cool and easy to take and will add to your portfolio.