All cities and many smaller towns have an oficina de turismo or oficina de información turística. In the country's provincial capitals you will sometimes find more than one tourist office – one specialising in information on the city alone, the other carrying mostly provincial or regional information. National and natural parks also often have their own visitor centres offering useful information.
Turespaña (www.spain.info) is the country’s national tourism body, and it operates branches around the world. Check the website for office locations.