Take a trip to nearby Conca dei Marini to visit the stalactites of the Grotta di Smeraldo or Emerald Grotto, where the waters are as brilliantly emerald green as those of Capri's Grotta Azzurra are blue, believed by many to be even more beautiful.
The Emerald Grotto is named after its shimmering green waters.
Finish your visit to the Marais with a walk through the old Jew?­ish quarter (or shtetl, as Paris Jews call it) around the Rue des Rosiers, enjoying the wonderful smells from its delicatessens and falafel shops.