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