Metro: Lamark Caulaincourt.
Go up the steps above this neat metro station. The location of the cache is walled-off, gated, and closes at 18h00 (6h00pm) (16 March - 05 November) 17h30 (5h30pm) (06 Novemebr - 15 March) in the evening.
While you're here, take in the beautiful (and famous) views of the Sacre Coeur, le close de Montmartre (vineyard) and the little restaurant/theater Au lapin Agile. One visit here in the summer and you'll know why the original title of this cache was "Dreams of Wine and Roses!"
Be sure to say 'Ciao' to Utrillo before leaving...unless he is too busy feeding the cat!!