Congratulations eddieblz, it is the Island of the Dead (3rd version, 1883) by Arnold Bocklin.
NOTE: Please feel free to post your own 'What Painting' picture for others to identify.
It does not have to be portioned (though I think it works best). Use your own imagination for other ways for disguise.
I think it be best to have one picture at a time, after which another can be posted.
I suggest a 12-24 hour cooling off period between pictures, so others get a chance to post their disguised picture.
If no one posts a picture this time tomorrow I'll post another picture.
In the meantime, go for it. Or post your thoughts on this suggestion.