Laurence M.
Google
There is so much to see: the visit of the well restored Castle, includes free guided tour/audio via QR code, step by step description at each station. An incredible site, for 10€ pp., it's well worth taking the time to understand the many eras of history that made South of Spain what it is today. It transport you through the medieval times up to the Renaissance.
Just the walk from the Mercado de Abastos up to the Castillo offered a delightful 180° view of the white city and the ocean a km. ahead.