TripAdvisor recently named its list of the world's Top 10 art museums. I reviewed the list and discovered I've visited 7 of the 10 so far in my life. Not too shabby!
1) Musee du Louvre (Paris, France)
2) Vatican Museums (Vatican City, Rome, Italy)
3) Metropolitan Museum of Art (New York, NY)
4) J. Paul Getty Center (Los Angeles, CA)
5) Musee d'Orsee (Paris, France)
6) Uffizi Gallery (Florence, Italy)
7) Art Institute of Chicago (Chicago, Illinois)
8) Tate Modern (London, England)
9) Prado Museum (Madrid, Spain)
10) National Gallery of Art (Washington, D.C.)
My personal opinion: Great list, but could also see the British Museum, MoMA, and Guggenheim(s) as other possible contenders.