Predawn light over Dubrovnik, Croatia, with its characteristic medieval city walls. Dubrovnik is a Croatian city on the Adriatic Sea, in the region of Dalmatia. It is one of the most prominent tourist destinations in the Mediterranean, a seaport and the center of Dubrovnik-Neretva County. In 1979, the city of Dubrovnik joined the UNESCO list of World Heritage Sites.
The prosperity of the city was historically based on maritime trade; as the capital of the maritime Republic of Ragusa, it achieved a high level of development, particularly during the 15th and 16th centuries, as it became notable for its wealth and skilled diplomacy.
A feature of Dubrovnik is its walls that run almost 2 km (1.24 mi) around the city. The walls run from four to six meters (13.2 to 19.8 feet) thick on the landward side but are much thinner on the seaward side. The system of turrets and towers were intended to protect the vulnerable city. The walls of Dubrovnik have also been a popular filming site for the fictional city of King's Landing in the HBO television series, Game of Thrones.