I like to have a walk in the Passages Couverts in Paris. Those galleries date from the beginning of the 19th century and were in a way the precursors to our modern shopping malls. Most of them have beautiful glass roofs and are true architectural gems. My favourite walk starts from the metro station Le Peletier and ends four metro stations further south on metro line 7 at Palais Royal. It enables to discover four of the main Passages Couverts, all different and each having a very special character. This walk is even more magic during Christmas time as the galleries are all decorated with tinsel and fairy lights. You can choose a rainy day as the galleries are covered; but keep your coat as they are not heated at all!