This article might be interpreted as a theoretical journey in the realm of geographical investigation aimed at specifying the kinds of entities that such an investigation presupposes. Indeed, the purpose of these pages is to sketch what could be included in a geographical universal catalogue of all geographical entities there were, there are and (maybe) there will be. The starting point is Marcello Tanca’s thesis that geography presumes a hybrid ontology, grounded – at least – on three different joints of (...) the geographical investigation: things, representations and practices. Speaking about geographical things, we discuss the famous distinction between bona fide and fiat boundaries, proposed by Barry Smith. When we apply such a dichotomy to the (corresponding) bounded entities, we see that the distinction shows some ambiguities, which could make us question the existence of proper bona fide entities. Then, the topic of geographical representation is taken by the horns. Firstly, we introduce the notion of cartographical entity, which subsumes everything that could be portrayed on maps. Secondly, we address the possibility of a cartographical catalogue, suitable for including all cartographical entities. Thirdly, we apply the first two steps to the notions of Geographic Information Systems (GIS) and geo-ontological entity. Finally, in the conclusion, we consider whether and how these (cartographical, GIS and geo-ontological) catalogues could enrich our geographical universal catalogue. (shrink)