I thought people might be interested in a couple of new bouldering walls that have opened near Paris recently, both the 'right' side of the city for Font visitors:
In Alfortville:
http://www.hardbloc.fr/
In Montreuil:
http://www.arkose.com/
I haven't been to either yet but I've heard some good reports. Quite expensive for one-off visitors though, around 14 euros.
