We’ve taken a couple trips to spots nearby Cadiz, first to El Puerto de Santa Maria, mostly for the ferry ride, and then to Doñana National Park. The latter required a bus ride, a stay at another AirBnb in Sanlucar de Barrameda, and then the boat ride up the Guadalquivir River (which flows by Cordoba & Sevilla) to visit two conservation sites that are part of Doñana.
El Puerto de Santa Maria
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Sanlucar de Barrameda & Doñana National Park
Random Vail 