Whilst visiting the Costa Calida, you might want to take a look at the newly restored Mazarron castle, which while still largely a ruin, has been conserved for the future. Originally built by the Duke of Velez in the 16th century, Mazarron castle served the area both as a defense against pirate attacks and for the protection of the valuable alum mining industry, which was important in Mazarron at that time. Mazarron and its coastal limb Puerto Mazarron, are popular tourist locations for the region of Murcia, and there are plenty more locations to visit in the area during your stay. Beach lovers will find over 30 beaches in the region. Mazarron Map.