- barcelona-metropolitan.com locations/cardona-…
- paradorsofspain.com parador-de-cardona.aspx
- barcelona-tourist-guide.com en/attractions/…
- en.wikipedia.org Castle of Cardona
- viator.com Barcelona-attractions/Castell-de-…
- arrivalguides.com en/Travelguide/BARCELONA/…
- tripadvisor.com Attraction_Review-g319799-…
- barcelonalowdown.com cardona-castle-salt-mine-la-…
- en.astelus.com Barcelona-tourist-guide/castle-of-…
- patrimoni.gencat.cat en/cardona-castle
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- actualidadviajes.com en/the-castle-of-cardona-…