Visiting Cadiz for one day whilst on cruise in August. Wondering if Cadiz is a nice place to stay and look around for the day or whether to visit Seville. I have been to Seville and absolutely loved it, however, my partner and daughter have not. I would love to return to Seville for the day, but the trips only allow 4 hrs there. I'm not sure if this is enought time to do Seville justice. Any comments appreciated please.