Clock towers are a common sight in many parts of the world with some being iconic buildings. One example is the Elizabeth Tower in London commonly called 'Big Ben' (although this name strictly refers to the bell inside the tower). Clock towers are a specific type of building which houses a turret clock and has one or more clock faces on the upper exterior walls. Many clock towers are freestanding structures but they can also adjoin or be located on top of another building.(Wikipedia)
"Torre del Reloj"