Ston sits at the base of the Pelješac peninsula, 20 km south of Drače and worth the drive for a half-day. The town is famous for two things: its extraordinarily long medieval walls, which climb over a rocky ridge and down to the smaller settlement of Mali Ston, and its oysters, farmed in the sheltered Bay of Mali Ston. The combination — fortifications and shellfish — is entirely typical of Dalmatia.
The walls are walkable and the climb gives panoramic views over the salt pans (still in operation), the bay, and the Neretva delta. In Ston itself, several restaurants serve the local oysters simply with lemon and olive oil — the Bay of Mali Ston's water is clean and cold enough to produce oysters of genuine quality. The salt pans produce sea salt that is sold throughout Croatia. Ston makes a natural day trip from Drače; allow three to four hours.