Ston, and its counterpart Mali Ston, sits on the cape of land connecting the Pelješac Peninsula to the mainland. Known as a salt-producing town, Ston was an important military fort of the Ragusan Republic, and the defensive wallls are world-famous. The 900 metre encircles the area for three miles - the second largest in the world after the Great Wall of China. Despite its military history, nowadays Ston is a small, laid-back fishing town, which boasts some dramatic views - think crumbling churches, olive groves and a stunning coastline. Its proving a winner with tourists, also drawn in by the superlative oyster farms (the oysters here have been commended as some of the best in the world.)