Cycling down rue du Faubourg St Denis last week I caught a glimpse of green through an unremarkable door.  Walking past yesterday I noticed the door open again and, with the permission of the caretaker, stepped into a hidden street.

This private passageway doesn’t have a name, just a street number.  It doesn’t appear in the list of historic buildings for the tenth arrondissement or in the Wikipedia entry for rue du Faubourg St Denis.  When the door is closed you might wonder if you’d dreamt it.