"For us, fashion is an antidote to reality," Viktor Horstin and Rolf Snoeren once said. The couturiers founded their Amsterdam-based fashion house in 1993, and since 2003 they?ve injected plenty of whimsy into their menswear label, Monsieur. Inspired by "Hollywood stars who came to Biarritz to be glamorous," their ?40s-influenced men?s 2011 spring show in Paris featured boyish electro-pop singer La Roux performing in a lean suit, their signature specs, and a cravat—a wink to Viktor & Rolf themselves. Below, the designers? picks from their favorite city.