Discovering hidden passages

is a great pleasure. I try walking everywhere instead of taking public transport, which so far has worked very well. The walk from the Canadian Cultural Centre through the Tuileries back home to the Marais took about an hour and since I regularly get lost, I discover interesting passages, like the Passage du Grand Cerf or today the Galeries Vivienne, built around 1820. Many of these covered passages, forerunners of today's soulless malls, were left in a state of bad disrepair and even shut down until their revival in the late 20th century.