Which clock's bells mark Spain's televised New Year's Eve grape-eating countdown in Madrid?

The Puerta del Sol clock marks Spain's televised New Year's Eve grape-eating countdown in Madrid.

At midnight, the clock's twelve chimes guide the traditional eating of twelve grapes, one for each month of the coming year. The ceremony is broadcast across Spain, and crowds gather in the square to follow the same sequence together. The clock tower is attached to the former Royal Post Office building, now the headquarters of the Community of Madrid.

The custom is sometimes confused with the preliminary sounds heard before the actual chimes. The clock sequence is carefully paced so that the twelve main strokes can be distinguished, allowing celebrants to attempt the grape tradition in real time.

Puerta del Sol is also known for the Kilometre Zero plaque, a symbolic reference point for Spain's radial roads. That landmark is separate from the clock, but both help make the square one of Madrid's most recognizable civic spaces.