Geoparks are territorial organizations, whose primary aim is to foster sustainable local development through the promotion of geoheritage, geotourism and geoeducation. Sites of significant interest from the perspective of geosciences (geosites), as well as the overall geodiversity of the territory, are the fundamental resources for geopark activities. The distribution of these resources in the geographical space of geoparks may, however, be uneven. We first review four cases of UNESCO Global Geoparks from different European countries (Czechia, Germany, Hungary, Portugal) where such a situation occurs, with consequences on tourism development. Then, we place particular focus on an aspiring geopark of the Land of Extinct Volcanoes in SW Poland, providing evidence of its geoheritage and geodiversity values. The aspiring geopark integrates a mountainous–upland terrain and a lowland part, the latter with much fewer sites of interest and, apparently, fewer opportunities to successfully develop geotourism. Recognizing the challenges emerging from the non-uniform distribution of resources and learning from established geoparks, we highlight various opportunities to encourage (geo)tourism in the less diverse sections of the geoparks. Implementation of the ABC (abiotic–biotic–cultural) concept could be particularly helpful, as could be various events organized in these areas.