Isla de Santa Clara Nature · Donostia/San Sebastián, Donostialdea, Gipuzkoa Image of Donostia/San Sebastián, not of the place itself. Islet located in the middle of the Bay of La Concha, accessible by boat during the summer. Photo: Paco Marí (CC BY-SA 3.0) What to see and do in Donostia/San Sebastián