The Plaza Puerta del Sol is known as the heart of Madrid, and a good place to start the exploration of the city.
The square is also part of the historic center, and has the monument of King Carlos III on a horse.

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Puerta del Sol is not a place to stay. The people of Madrid see it more as a meeting point, main crossing, and passageway place. Infact there is a bus terminal and loads of taxi stands.
But there is also something interesting at the Puerta del Sol. A very traditonal coffee house offers its service since 1894. Its name is “Cafe Mallorquina”.
In the south of the square impresses the building called “Casa de Correos” with its conspicuous looking clock tower. The clock strikes only one time in a year on New Year’s Eve. This special moment is broadcasted in all Spanish living rooms, and part of the celebrations in the whole country.

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Metro 1, 2, 3: Sol