Which landmark's clock chimes are broadcast for Spain's main New Year's Eve countdown in Madrid?

The Puerta del Sol clock is broadcast for Spain's main New Year's Eve countdown in Madrid.

The clock on the Real Casa de Correos, the historic building at Puerta del Sol, provides the chimes used by millions of viewers for the midnight countdown. People in the square and across Spain synchronize the twelve New Year's Eve grapes with those chimes.

Puerta del Sol is one of Madrid's best-known public squares. It contains the Kilometer Zero plaque, traditionally used as the reference point for measuring distances on Spain's radial road network, and the famous statue of the Bear and the Strawberry Tree. The square's clock became central to nationwide New Year broadcasting through radio and television.

The clock sequence includes preliminary sounds before the main chimes, so participants must wait for the twelve counted strokes. Visitors sometimes confuse the clock with Madrid's civic monuments nearby, but the countdown is specifically associated with the clock atop the Real Casa de Correos.