The unofficial capital of the Champagne region, Reims has luxury in its regal veins, not to mention bubbly. Many of the world’s top Champagne houses—including the likes of Ruinart, Veuve Clicquot, and Pommery—are headquartered here, and descending into their UNESCO-listed, Roman-era chalk cellars (some up to 131 feet, or 40 meters, deep) for a degustation session is among the top things to do in Reims. The High-Gothic Reims Cathedral, where French kings were once crowned, is another unmissalbe UNESCO-listed site, although don’t leave without indulging in a fine-dining experience, complete with flutes of local fizz.