So you have seen photos in textbooks or in National Geographic, but thought you would never see it. This may be Monet's "Water Lilies" (Orangerie, Paris) or "The Birth of Venus" (The Uffizi in Florence) or "Guernica" (The Prado in Madrid) (None of which are in the Louvre.)
You stroll in and turn a corner that there it is! You would not have seen it if you had not gone to the museum.
Visit the museums.

