Fontarabie is a small fishing village on the Spanish border, home to the best pintxos in the entire Basque region. For a more traditional excursion, take the boat to Hendaye, which drops you off right at the port.
Elbow your way up to any bar in the bustling streets of this small pueblo, and share small dishes of chipirones or Bellota ham, washed down with a glass of Rioja. Each institution has its specialty, often derived from secret family recipes.
The atmosphere in San Sebastián's Casco Viejo district is always festive. The best strategy: visit the old town in the afternoon, including the full length of the pier and the Museo de San Telmo, and then hit the tapas bars.