I've read here (Spanish) that "most petrol stations and visitor centers have free wifi". Is true? Is there any list of petrol stations with wifi?
Yes, major petrol stations do have wifi, such as all the N1 stations (company name). However it's only usually free.
- a list of all the N1 service stations
- all the OLIS stations, with the option to filter all the ones with free wifi
- all the Skeljunger stations
It's also available at tourist information centres and at all branches of the city library.
Vodafone also has a wide net of internet hotspots, with a listing of all their locations online.