Probably the busiest roundabout in Europe, we counted 11 lanes around the arc with lots of streets branching away and then there’s the mystery of giving way in this stressful situation. So glad we were walking… Accidentially vitnessed a parade followed by a flag ceremony and a national tribute to the firefighters of France. After that we got completely lost in the metro (underground train network) but with luck made it to Montmartre to see the famous white basilica on the hill :)