Perched on its butte and crowned by the Sacré-Coeur, Montmartre feels entirely its own. Cobblestone streets, hidden staircases, vine-covered walls, artists at work — it has a rhythm that the rest of Paris doesn't. Locals here call themselves Montmartrois, not Parisians. That pride tells you everything about the neighborhood's character.

December Paris has a quality that's hard to describe until you've seen it. The lights on the Champs-Élysées, the Eiffel Tower sparkling against a dark winter sky, the smell of vin chaud drifting from a market stall — it's the City of Light living up to its name in the most literal way. It's also, I'll be honest, a season that requires planning. The most popular spots are crowded, the best restaurants book up fast...

when I design an itinerary, I always build in what I call a "rainy day layer" — a parallel plan that kicks in when the weather doesn't cooperate. Not a consolation prize. A genuinely good day, just indoors. Here's what that looks like.