The cathedral is very large but not that complicated. We used the audio guide and I would NOT recommend this unless you are REALLY interested in the art works as it tells you very little about the background to the cathedral but goes into great deal about every picture in ALL the side altars. Obviously what everyone goes to see are the golden altarpiece, the tomb of Columbus (if you discount the one in the caribbean) and Giralda Tower. For these, it is worth the admission price.
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