The famous Guggenheim Museum in Bilbao and the "Mommy" spider of Louise Bourgeois honestly the only thing to see there, but really impressive, even for those who prefer straight angles... Also the cheapest Tapas ever found on the planet : 7 euros for the two of us, in a local pub, excellent and really good, but I could hardly tell you where it was...
The castle and church of Javier : birth place of Saint Francois Xavier, in the middle of nowhere, although close to Pampelune. Xavier went to Japan in the 16th century to evangelise the natives. Lucky he did not end up as sukiyaki...La ville de Javier, pres de Pampelune, en pleine cambrousse. C'est de la que Saint Francois est parti évangéliser les Nippons... il a eu de la chance de ne pas finir en sushi...
Ochagavia, a beautiful town in the north of Aragon, near the border, a very good restaurant there, but beware of Spanish timetables : they open at 13h30, better take a good breakfast.
A street in SOS DEL REY CATOLICO, a really beautiful place, there was a medieval fair going on , lots of activity, concerts and so on. If you go there, try the Parador, the local 4* hotel, very good and not so expensive..
San Juan de la Pena, another monastery, with the 12th Century section built under a cliff, very impressive. The newer section is 18 th century but completely remodeled with a museum and hotel. A beautiful mix. the Spanish architects are really talented... 
