text: Its cobblestoned streets are full of atmospheric tascas ( tapas bars ) and restaurants , and they contain several of the city 's most important sights , including the Royal Palace , Plaza Mayor , Puerta del Sol , and Monasterio de las Decalzas Reales , Madrid 's most important convent .
  
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  Its cobblestoned streets are full of atmospheric tascas because of the huge local presence .