Castell d'Aro, 3 km inland from the beach resort, is the historic heart of the municipality — a compact medieval village of stone houses, narrow cobbled lanes, and a central church square that feels entirely different from the tourist strip at the shore. The ruined Castell de Benedormiens at the village edge dates to 1041 and now hosts art exhibitions and cultural events in its partially restored rooms; the outer defensive works and moat are visible from the adjacent car park.
The village tourist office runs free guided walks of the old town from spring through autumn — a good way to understand the history of the area before heading back to the beach. The Museu de la Nina (Doll Museum) in the village centre has a collection of dolls from across Europe and the Americas, a curiosity that is more rewarding than it sounds. The village has several good restaurants serving traditional Catalan food, a welcome alternative to the seafood-heavy options on the beach strip.