Description
Trees may seem huge to us, but a huge proportion of them are hidden underground. Come and discover their secrets on a walk that will unravel some of their mysteries, or reveal new ones.
**Meeting point:** 2pm, St Nicolas church parking lot, 344 rue du Maréchal Leclerc, Sainghin-en-Mélantois
**Duration:** 2 h
**Contact:** Conservatoire botanique national de Bailleul on 03 28 49 00 83
