A boat floating along the waterways of Amsterdam or Manhattan's S-Train to Times Square?  Similar to my post about Kulula Airlines wrapping their airplanes, I love this campaign by the Dutch Bureau of Tourism & Conventions along with KLM, aptly named "Just Be In Holland".  The promotion was only for February, but why stop?  I can imagine so many fun things to put on those dreary trains... thought bubbles, googly eyes, etc.