Murcia is a rather big city (350.000 inhabitants), capital of the province with the same name, in with you also find other two big cities: Cartagena, and Lorca. They together sum more than a million people.
Murcia have a lot of beautifull beaches, some of them are still virgin territory, and other are very busy places at summer time, like "La Manga", a kind of lake connected to the sea.
...this is all by the moment! I will come later to write a little more.