Vigie-Terre is a citizen science project under development at the French National Museum of Natural History that objectives to allow volunteers to report and describe fresh, visible outcrops. An online reporting protocol has been developed to locate and describe a fresh outcrop and allow geologists scattered throughout the territory to assess the geological interest of the site. The aim of Vigie-Terre is to estimate the potential number of outcrops of geological heritage interest uncovered each year and to promote actions of preservation and to improve knowledge of these sites. Finally, the data collected should help to launch a debate on a possible « preventive geology » as it exists in archaeology.