Where?: Zaragoza is in the autonomous community of Aragon. It is roughly half-way between Bilbao and Barcelona.
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Built: There are two cathedrals in Zaragoza - La Seo and the Basilica-Cathedral of Our Lady of the Pillar. The latter is the more attractive one, built in the late 17th century. A number of churches had existed on this site since St James saw an apparition of the Virgin Mary.
What's Inside?: A statue of the Virgin Mary, supposedly given to St James by Virgin Mary herself. The feast of Our Lady of the Pillar on October 12 coincides with the day that Columbus discovered the new world. Each country from Latin America has donated something to the cathedral to celebrate this fact.
Website: No website.