On Sunday, June 11, we arrived 45 minutes early for our 10am time slot to visit 6 million dead people in the Parisian catacombs.  We descended a spiral staircase into the underground–130 steps–leading to the darkness below.  We walked 1.5km, stopping at visual markers that synced with our audio tours explaining the reasons behind the rows and rows of femurs and skulls that surrounded us. After we surfaced, we stopped by a patisserie, grabbed some croissants and quiche, and then picnicked at Luxembourg Garden to eat before the…