How to reach Cadiz: From Sevila there are two ways to get there: by bus and by train. If you want to choose cheaper option, it is a bus, but it may take longer time with traffics and stops on the road. If you prefer more comfortable and fast variant, it would be buses with better AC and more spaces, but with a bit expensive price! Also you can rent a car, which is quite cheap and comfy to visit more places and beaches around the city or some people use Blablacar app, which costs almost nothing really!
Where to live in Cadiz: There are also several options. So if you dont want to spend a lot of money then you can just visit it without spendind a night, because train and bus goes every hour from Sevilla. But i would recommend you to spend at least two days to enjoy fully. Except cheap hostels and hotels, you can also rent an apartment on the center via Airbnb or other websites. The price can vary from 100 to 400 euros two days. Also it does not matter if you find place to live in the center or further, since the city is reallu small and from any place to seaside takes just 5-20 minutes.
Where to eat: After arriving, once you will see lots of cafes and restaurants everywhere as in all cities of Andalucia, but they opens around 3-6pm, so there are options like Cadiz market ( which should be in your must visit list!) or many stores ( Sol, Dia, Mas).
Places to visit Cadiz: So if you want to explore the city and its history, first famous destination is The Cadiz Cathedral, which looks like white mosque. The construction started in 1722 years and changed several times.
Also dont forget to visit its Tower Poniente and go up there to see incredible view at the city and ocean (NICE SPOT TO PICTURES). In a list of old city also should be: The Tavira tower, San Sebastian Castle, Santa Catalina Castle, The Museum of Cadiz, Plaza De Espana in Cadiz.
Visit beaches: La Caleta beach, it has white wooden building, which can be used as shadow place in a beach and sunset looks amazing with many boats on the water.
Also there are La victoria and Santa maria beaches which is less crowded.
Visit parks: It really can be defined as a paradises, plants and flowers you never seen, butterflies and birds flyind around them. So the most beautiful ones are Genoves Park and Alameda Apocada Park.
Also dont forget to bring warm clothes, since temperature is much colder than in Sevilla, even in summer, but still you need hats and sunscream with 50spf, and enjoy in amazing city!
Pictures were taken by @fabi_ab