The SPELEOTHECA site is dedicated to the inventory, description, and management of speleothems—cave deposits used in palaeoclimatology, archaeology, and other fields. It includes images of speleothems (2D and 3D), associated data (dating, isotopes, etc.), geographic information (maps), as well as monitoring sites and datasets. SPELEOTHECA is organized into “Collections,” often linked to individual researchers. Beyond its role as a descriptive and inventory platform, SPELEOTHECA also aims to facilitate the sharing of data and physical samples with researchers wishing to pursue further studies. Anyone interested in contributing to this extensive database and sharing platform is warmly welcome.