Walking is the best way to get around Cadiz since most of the sites are close to each other. A taxi ride from the city center to Caleta Beach costs around 8 EUR, and the journey takes about 10 minutes.
If you have more time, consider visiting the Roman Theatre, the Castle of Santa Catalina or taking a boat tour around the Bay of Cadiz. If you have less time, skip Casa del Obispo and spend more time at the market or the beach. Don't forget to wear sunscreen and comfortable shoes.