From Vox: You’ve seen it on the highway: a giant RV, lumbering by with its exterior totally covered in swooshes and swoops. Those lines of paint seem to grace the sides of every recreational vehicle, and for decades they’ve defined the RV aesthetic. But where did they come from? In this video, producer Estelle Caswell heads to Elkhart, Ind. — the global capitol of RV production — to investigate why these swoops are everywhere, and whether they’re here to stay. While there, she explores Elkhart’s RV history museum and library and speaks to RV designers who love and hate the swoops. Will RV makers be forced to change their infamous look to appeal to younger generations obsessed with clean aesthetics? Or are we stuck with this look for the next 20 years?