Thassos's position just off the Macedonian coast puts several significant mainland sites within easy ferry reach, ideal for a change of pace from island life.
The nearest mainland city, a 35-40 minute ferry ride from Limenas, built around a Byzantine fortress and an Ottoman-era aqueduct overlooking a lively harbor. Kavala's old town (Panagia quarter), tobacco-trade mansions, and waterfront fish tavernas make for an easy half-day or overnight trip.
A UNESCO World Heritage Site about an hour from Kavala, Philippi preserves an extensive Roman forum, basilicas, and the amphitheater where Mark Antony and Octavian defeated Brutus and Cassius in 42 BC. It's also historically significant as the site of St. Paul's first sermon on European soil. Combine it with Kavala for a full mainland day trip.
The mainland's other ferry gateway to Thassos, a small coastal town near Kavala International Airport with a long sandy beach and relaxed fish tavernas. It's a convenient stop for travelers connecting between the airport and the island.