Symmetrical Portraits by Julian Wolkenstein.
Testing the “myth” (is it a myth?) of symmetrical faces being more attractive than non-symmetrical, Wolkenstein photographs faces, first naturally, and then with symmetry applied via a mirror effect. The result is interesting. I still don’t think it’s a myth, as the portraits, in my opinion, show an improvement in attractiveness when symmetry is applied… for most, not all.
Also, check out Echoism, where you can upload your own photo and play with it’s symmetry.