Getting a visit from your parents has its advantages: you have to consider how to keep them occupied – and that’s when you come across places that most Parisians have never visited. Jardin Albert Kahn is situated in the banlieue (suburbs), which for native Parisians are the equivalent of Sodom and Gomorrah, ghetto and gangsters. Everything outside the city ring road, the périphérique, is ignored with a strange mixture of snobbery and cowardice. You don’t venture there if you really don’t have to. In the case of this destination, however, this is a rather unjustified prejudice. Boulogne-Billancourt is one of the chicer banlieues anyway.