11. Roa

Location: London

You might think that you just can't bear to see one more massive black and white animal painted by Roa. After all, they seem to be everywhere. But then he does something like this piece on London's Southbank Centre that reminds us all why we love his work so much. It's been said that murals can energize public spaces or walls, but few do so like this one, with two animals caught mid-flight and possibly mid-fight. Interestingly, Southbank Centre is right next to the National Theatre, where Banksy once painted the word "BORING" in massive letters with a painted-filled fire extinguisher.

photo by surreyblonde