The Garraf Natural Park covers more than 12,000 hectares of stark white limestone hills stretching west from Sitges to Castelldefels, dropping sharply into the Mediterranean along some of the most dramatic coastal scenery in Catalonia. The landscape is unusual this far south — arid and almost lunar, scattered with wild palm and prickly-pear, riddled with caves and underground rivers carved into porous karst stone. It looks more North African than European, and the contrast with the green hinterland of the Penedès just a few kilometres inland is striking.
The coastal road between Sitges and Castelldefels skirts the eastern edge of the park along clifftops with uninterrupted sea views — one of the finest short drives in Spain. You can pull over at several miradours where the limestone drops sheer into blue water. Marked walking trails climb into the interior: the main summit, Morella (594 m), takes about three hours return from the trailhead near Garraf village, and a branch leads to the ruins of the medieval Olesa castle.
Near the village of Garraf itself, the Celler Güell is an unexpected architectural find — a wine cellar and gatehouse designed by Antoni Gaudí and Francesc Berenguer around 1895 for the Güell family estate. The Gothic-influenced brick façade, complete with a chapel tower and pointed arches, is startlingly ornate for what is essentially a farm building. Visits by appointment give you access to the interior and the small chapel. From Sitges, the park is walkable within twenty minutes along the coast path.