Some 60km east of Orebić, the twin settlements of Ston and Mali Ston straddle the isthmus joining Pelješac to the mainland. An important salt-producing town on the southwestern side of the isthmus, Ston was swallowed up by Dubrovnik in 1333, becoming the most important fortress along the republic’s northern frontier. The republic built huge defensive walls stretching across the isthmus to the nearby harbour of Mali Ston, which became the northern bastion of a unified fortification system. Nowadays the twin town is primarly known for Mali Ston’s oyster beds – the aphrodisiac effect of the local molluscs makes the place an ideal venue for romantic weekend breaks.