San Sebastián owes its nickname, "pearl of the Cantábrica", to its scallop-shaped bay, La Concha. Partially closed by the islet of Santa Clara, it stretches from Monte Urgull to Monte Igueldo. Two vast sand beaches follow the curve of the bay: La Concha, and beyond the promontory, the fashionable Ondarreta, offering a choice of pleasant strolls along the beach lined by luxury apartment blocks. Beyond the beach, at the foot of Monte Iguelo, is the Peine de los Vientos, the work of sculptor Eduardo Chillida.