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Hannah will visit Madrid tomorrow and visit these two sites as well as tour the city with her group. Here's a photo of the Puerto del Sol.
Wikipedia says:
The Plaza Puerta del Sol is the perfect starting point to explore Madrid. This bustling, centrally located square is one of the city's most lively places.
The Plaza Mayor, a grand arcaded square in the center of Madrid is very popular with tourists and locals alike. The symmetrical rectangular square features a uniform architecture, very similar to the contemporary Place des Vosges in Paris.
Follow the link below to view a live webcam view of the Plaza Mayor.
http://www.multimadrid.com/hogar.htm