✔ 最佳答案
I can give you another advise from Gare de Lyon to Opera, you can take RER A, from the station Gare de Lyon to Auber, is direct. From Auber to Opera just only 5 mins on walk. And the metro of Paris isn't dangerous, is the area, for ex: line 11 isn't dangerous but the station Belleville is most dangerous area in Paris... So, is depend!!! When you come to Opera, you can come to Galerie Laffayette to take the map of Paris because, I can tell you which area is dangerous. Paris 18, 19, 20 eme. North and East Paris are most dangerous in Paris, evan I live in Paris, I never want to buy apartment in these area!!! And I never living in these area too.