In 2021 the International Commission on Geoheritage of the International Union of Geological Sciences (IUGS) introduced a global programme for the nomination of Geological Heritage Sites (IGCP-731). According to IUGS, a Geological Heritage Site is a "key locality exhibiting geological elements and/or processes of international scientific relevance, used as a reference, and/or with a substantial contribution to the development of geological sciences through history". Under the slogan "The First 100" proposals were called for worldwide, requiring description, accurate location, geological significance and research history of the suggested sites, supported by suitable illustrations in the form of maps, sections, photographs or diagrams. Recognition as an IUGS Geological Heritage Site is expected to endorse its importance in demonstrating specific geological processes, ensure its preservation and protection in a changing - frequently endangered - environment, and promote geo-tourism through increasing its visibility in the public eye, with all attendant financial and environmental implications. The "First 100" were selected out of 181 entries from 56 countries by an international committee of geoscientists and announced on October 28, 2022, during the 60th Anniversary Meeting of the IUGS in Zumaia, Spain (Asrat et al., 2023). They are featured in a "coffee table" book entitled - predictably - "The First 100", which was designed to bring the wonders of geology and the forces that created them closer to an audience beyond the narrow circle of the geoscientific fraternity.