The Puerta del Sol is a public square in Madrid, one of the best known and busiest places in the city. This is the centre of the radial network of Spanish roads. The square also contains the famous clock whose bells mark the traditional eating of the Twelve Grapes and the beginning of a new year. The New Year’s celebration has been broadcast live since 31 December 1962 on major radio and television networks including Antena 3 and RTVE.

More details: https://en.wikipedia.org/wiki/Puerta_del_Sol