More than 10,000 visitors a day come to the Museo del Prado, which, with the world's most extensive collection of works by Goya and Velázquez, is at the top of the list of international art museums. Three attendants show us their favorite paintings, which are often overlooked - like the attendants themselves. They surprise us with their detailed knowledge and an unusual view of the artworks that were once part of the royal collection of Spain's rulers. "Here is the cultural heritage that belongs to all Spaniards - and is there for everyone."