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A road trip through the Basque Country, Navarra, and La Rioja would require at least a week, but a glimpse, however brief, of Bilbao and its Guggenheim can be done in two days. San Sebastián and its beach, La Concha, the Baztán Valley, Pamplona, Laguardia, and La Rioja's capital Logroño are the top must-see stops.

If you have more time, visit Mundaka and the coast of Vizcaya west of Bilbao; Getaria, Pasajes de San Juan, and Hondarribia near San Sebastián; and the wineries of Haro in La Rioja.

La Rioja's Sierra de la Demanda also has some of the finest landscapes in Spain, not to mention culinary pilgrimages to Echaurren in Ezcaray or Venta de Goyo in Viniegra de Abajo.