Spain is a popular country for many reasons including its low cost of living. But what type of costs are lower, and by how much?

Spain's national mail carrier is known officially as the Sociedad Estatal de Correos y Telégrafos, though it's more popularly known as simply Correos. Based out of Madrid, the service operates daily, except for Sundays and national holidays, and handles about 5.4 billion pieces of mail each year.