Cajas National Park (CNP), located in southern Ecuador, comprises an area of high natural, scientific and cultural value with wide recognition worldwide. This national park has a large number of elements that, as a whole, constitute a relevant geological heritage. However, this geological heritage requires an enhancement that complements the important contribution made by the Natural Park in terms of conservation and protection of the natural heritage. This study aims to evaluate sites of geological relevance present in CNP through international geosite assessment methodologies and thus provide knowledge favouring these resources’ sustainable use and geoconservation. The study phases comprise four stages: (i) a base information analysis of the study area; (ii) identification and selection of sites of geological interest; (iii) a geosite and geomorphosite assessment using the Inventario Español de Lugares de Interés Geological (IELIG) method and Brilha method; (iv) a qualitative assessment using a strengths, weaknesses, opportunities and threats (SWOT) analysis for the contribution and influence of geomorphosites in the development of the study area. This work made it possible to determine that all the analysed geosites and geomorphological sites (14) have a high and very high interest. The Llaviucu valley site stands out for its relevant scientific, academic and tourist value. The IELIG method revealed that 50% of the evaluated sites have a high protection priority, while the rest are in the “medium” category. In addition, the investigation through the SWOT analysis revealed that the geomorphosites could provide significant added value to the development of geotourism and of the NP itself, complementing the already known natural attractions; moreover, the study presented strategies for the use of these in the sustainable development of the area.