The definitive 'must' on any visit to Dubrovnik, the medieval city walls are best explored with a full-circuit, two-kilometre walk along the battlements.
Affording ever-changing views out to sea and over the old town, they offer excellent photo opportunities. On average 24m high and up to 6m thick, the walls date back to the 13th century.
Further reinforcements, including a series of imposing towers intended to protect the city against the Turks, were added in the 15th century.