The view of Trou-Morin, probably of medieval origin, was greatly restored around the 16th century and most recently in 2004. Here drained waters on slopes of Romainville gathered. These waters were then directed by a lead pipe towards the gaze of the Prise des Eaux du Pré Saint-Gervais and then towards Paris. Enter this unspoilt place, where abundant and clear water still flows today, which, after its passage, runs under Avenue Édouard-Vaillant. The Trou-Morin gaze tours are organized by the Association Sources du Nord Études et Préservations ASNEP.