Some say the mark of a true traveler is being able to pass for a local. But what does it take to become a global chameleon, truly? "Local Currency," a new series on the Plum TV hosted by Mark Ellwood (also a Travel + Leisure contributor) asks that very question—and takes viewers on a hilarious romp around Europe in search of the answer. Mark meets all kinds of opinionated natives, from rock stars to fashion designers, who riotously coach him on how to blend in. First stop: Antwerp, where we learn, among other things, that French fries go best with tartar sauce. Douse them in ketchup, and bingo—you’re branded a foreigner. For more local tips, tricks, and zany encounters, be sure to tune in to Plum this summer.