On their territory, the Walloon and Hauts-de-France regions have many underground caves of anthropogenic (mines, quarries, etc.) and natural (karst, etc.) origin, which often pose a threat to the safety of people, property, development projects and the socio-economic attractiveness of certain territories. While public policies on both sides of the border to prevent and manage subsoil risks pursue common objectives, the tools implemented are different and could be improved. The RISSC project proposes cross-border improvements to local policies on risk prevention and management, spatial planning and civil security (recommendation guides, regulatory summaries, demonstration sites, awareness-raising actions, symposia, cross-border networks of local authorities and experts). It adopts an innovative, integrated and coordinated approach: it pools existing resources (regulations, data, methodologies, etc.) and combines exchanges of good practices on a cross-border scale to propose a management of the natural risks of ground movements generated by underground caves, guaranteeing the on-going natural, landscape, urban planning and heritage continuity of cross-border territories.