After Seville, Charles and I headed to the Costa de la Luz, the western portion of Andalusia that abuts the Atlantic Ocean. This region stretches from the Portuguese border all the way down to Tarifa, the southernmost point of the Iberian Peninsula. We stayed in Jerez de la Frontera, the sherry capital of the world, and explored the coast via a rental car. It was the one place on our Spain trip where I felt like we didn’t have enough…