The underground space in the square in front of the Cathedral is used as a restroom and a small archaeological museum
It was a brightful day. We walked through the squares and parks of old mansions, visited the Picasso Museum, the art galleries, had lunch at the Place des Vosges, visited the Place de la Bastille and completed the walk by the princely and quiet boardwalk of the River Seine, where live swans and peace reigns.