Castell d'Aro, Platja d'Aro i S'Agaró is a municipality in the middle of the Costa Brava in Catalonia, Spain. It is formed from two parts: Castell d'Aro is an ancient village built around a medieval castle and a fortified church, 3 km inland on the road from Platja d'Aro to Santa Cristina d'Aro; and Platja d'Aro is a coastal town on the road from Palamós to Sant Feliu de Guíxols which stretches along a large 2 km beach. Originally a small fishing village, Platja d'Aro is now a major coastal resort, popular predominantly with Catalans and villa-owning Northern Europeans.