Santander is the capital of the Spanish region of Cantabria. It is located at the Bay of Santander which is the center and soul of the city. The metropolitan area of the Bay has a population of about 300000 inhabitants. There are many things you can see and do in Santander. For full reference you can go to the Santander tourist office web page:
https://turismo.santander.es/en/
If you want a 5 minutes tour through Santander in youtube please check out this video:
https://www.youtube.com/watch?v=oapDJTtHFGU
In any case I give you here some "personal" tips about the city. I hope you have the chance to enjoy it.
Gastronomy
The north of Spain is very well known because of the gastronomy and Santander is not the exception. These are some of the best places for pinchos:
Of course you can also go for a proper dinner. You can find many different restaurants in the city ranging from Michelin Star holders with highly sophisticated food to traditional restaurants. This is a list of some of the best ones:
The list is really very big. You can check a full guide at:
Walking around through the city center
Botin center
This is a modern art museum built by the family owning the Bank of Santander.
Museum of prehistoric art
Cantabria is the region in the world with a higher number of caves with prehistoric art. The museum is really nice.
http://www.museosdecantabria.es/web/museoscantabria/Prehistoria/visitar/Situacion
The cathedral
Plaza porticada
Right now there is a temporary exhibition showing the history of Picasso's Gernica.
El Mercado del este
Boat tour through the bay
You can have a nice boat tour through the bay and also the surroundings of Santander.
https://www.santanderbahiatours.com/es/paseo-en-barco-en-santander
Other stuff in Santander
Street art
In the last year Santander became a reference for street art (probably led by Okuda, who is actually from here). You can see a full guide here:
https://www.rutasporsantander.com/tour/tour-streetart-murales-okuda/
General agenda of events
Apart from that you can see all the exhibitions, concerts, etc in this agenda here:
https://www.santandercreativa.com/web/calendario-de-eventos/