We booked an Airbnb apartment for our week in Paris. It was smack dab in the middle of the 18th Arrondissement. “The 18th” includes such famous sites as Montmartre, Moulin Rouge, and the Sacre-Coeur Basilica. Our apartment was found near the crossroads of Rue Ordener and Boulevard Ornano. The Metro station is Marcadet-Poissoniers on Lines 4 and 12.