The most cosmopolitan city in Spain is Barcelona. :)
If size is an indicator, the most popular city in Spain is Madrid by a landslide.
Most people in Spain are Christians.
Madrid, the capital city
Barcelona is not a country: it is a city. It is in the country Spain. Yes, they do speak Spanish in Spain.
Valencia is the 3 rd largest city in Spain.
Madrid
Madrid
Barcelona.
Badajoz
Most major cities in Spain with major airports have companies that have charter services. The most likely city would be Madrid.
Tarifa is the southern most city in mainland Spain. The southern most populated area in all of Spain is the village of La Restinga on the island of Frontera in the Canary Islands.