Here’s a nice list of museums. Lets see now which ones have I ticked off?
Louvre Paris, British Museum London, Tate Modern London, Met Museum of Art, NY, Vatican Rome, National Gallery London, Musee dOrsay, Paris, Prado, Pompidou, Hermitage, V&A, Portrait Gallery. Hmmm, ok, I think its a good spread but look forward to ticking off the others, but not sure about the modern art ones, that makes my hair hurt and eyeballs hairy.
Also check out the comments on the Economist page.