In association with the Joint Technical Committee on Natural Slopes and Landslides (JTC1) and the Federation of International Geo-engineering Societies: ISSMGE, ISRM and IAEG (FedIGS), the Colombian Geotechnical Society (CGS) cordially invites the international geotechnical community to participate in XIII ISL: http://www.scg.org.co/xiii-isl/index.html