It's the most famous cafe in the world, still fighting to maintain a Left Bank aura despite hordes of visitors from around the world. Sartre -- the granddaddy of existentialism, a key figure in the Resistance, and a renowned cafe-sitter -- often came here during World War II. Wearing a leather jacket and beret, he sat and wrote his trilogy, Les Chemins de la Liberté (The Roads to Freedom). Camus, Picasso, and Apollinaire also frequented the Flore. The cafe is still going strong, though the famous patrons have moved on and tourists have taken up all the tables. The menu offers omelets, salads, club sandwiches, and more. The place is especially popular on Sunday mornings.