First, head to Hondarrabia, a small fishing village on the Spanish border. For a more traditional excursion and for a great family outing, take the boat in Hendaye which drops you off right at the port.
In the bustling streets of this small pueblo, the walk up the Historic district will take you along the fortress wall, from where you can enjoy unobstructed views over the entire bay. For either lunch or dinner, go to San Pedro: elbow your way in to small dishes of chipirones, Bellota ham, washed down with a glass of Rioja. They are the best pintxos in the entire Basque region and each institution has its speciality, often derived from secret family recipes.
In San Sebastián's casco viejo ("old neighbourhood") district, the atmosphere is also always festive. The best strategy: visit the old town in the afternoon, especially the full length of the pier and the Museo de San Telmo, as well as the Monte Igueldo theme park, accessible with a cable car, and the unmissable panoramic viewpoint. If you feel dizzy, the city aquarium will show you the beauties of the aquatic world. To end a perfect day, what could be better than hitting the tapas bars!