The last time I was in Paris I spent most of my time around the Eiffel Tower or in one of the city's many museums - so I didn't really get a sense of how wonderful all of Paris' other neighborhoods really are.
Paris is divided into 20 districts, referred to as arrondissements. Within each arrondissements are neighborhoods, which are sometimes shared across districts. The system can be confusing at first but the hard boundaries don't mean much when you're just wandering the streets and taking it all in.
We set off in the morning from Les Halles and wondered east into Le Marais, the neighborhood that straddles the 3rd and 4th arrondissement, which is praised for it's great food and even better shopping. Then we strolled south across Île Saint-Louis and into the 5 arrondissements. From there we took our time walking down Boulevard Saint-Germain into it's namesake neighborhood, Saint-Germain-des-Prés, best known for its chic atmosphere and adorable cafes.