Calle de Alcalá is among the longest streets in Madrid. It starts at the Puerta del Sol and goes on for 11 kilometres, to the northeastern outskirts of the city. Henry David Inglis described it in 183
Calle de Alcalá with the Edificio Metrópolis, the Círculo de Bellas Artes and the La Unión y el Fénix Español building in the background