let us discover the musée des égouts de Paris.
The Parisian sewer system dates back to the year 1370 when the first underground system was constructed under "rue Montmatre". Since then, the system has been enlarged continuosly to cover the city's population.
Visit the website for more information: http://www.paris.fr/loisirs/musees-expos/musee-des-egouts/visite-publique-des-egouts-de-paris/rub_9691_stand_5943_port_23931
The entrance fee is 4,30Euro. There is no free entrance to this museum on the 1st sunday of the month, as it not a classical museum. (There is a group rate available for 10 people and more - 3,50Euro, but I think 4,30Euro are also affordable, in case we do not reach the minimum limit).
The visit generally lasts around 1 hour and is not guided. We can move freely in the museum and follow a predetermined path. The history and further informations are displayd in English and French on boards.
You can take photos.
We meet at 13h30 at the La Poule au Pot, 121 rue de l'université, 75007 Paris to have a drink and get to know each other.
Around 14h00 we will head over to the musum.
See you there.