Among quite possibly the most lovely places in Jerez de la Frontera is the interior in the cathedral. You can enter the cathedral to get a cost of 7 EUR (see timetables and costs here) then take a look at the cathedral, and all the concealed corners (such as https://jasperunbob.tblogz.com/jerez-de-la-frontera-hogar-de-videntes-extraordinarios-no-further-a-mystery-40924282