The Podrinje-Valjevo Mountains (located in Western Serbia) constitute the longest mountain range in Serbia and possess numerous and diverse geo-heritage sites. In prior research, this region has been poorly investigated in terms of evaluating its geo-sites for geo-tourism potential. The aim of this paper is to evaluate and compare protected geo-sites in the Podrinje-Valjevo Mountains in order to determine their current state and potential for future geo-tourism development. This is done by applying the modified geo-site assessment model (M-GAM). Eight geo-sites were analysed and evaluated: Kovačevića Cave, Trešnjica Gorge, Taor Springs, Gradac Gorge, Crna River Gorge, Petnica Cave, Ribnica Gorge, and Ribnica Cave. The research results show the analysed geo-sites possess substantial geo-tourism development potential for making the Podrinje-Valjevo Mountains a geo-tourism destination. However, there is a lot of room for improvement of additional values such as promotion, tourist infrastructure, visitor centres, tour guide services, and interpretative panels. The results also show that there are certain differences between the evaluation of hydrological and speleological geo-sites within a region. Therefore, in order to comparatively analyse with maximum relevance, it is proposed to use the model to evaluate the same type of geo-sites.

Podrinje-Valjevo山脉（位于塞尔维亚西部）是塞尔维亚最长的山脉，拥有众多多样的地质遗迹。在先前的研究中，该地区在评估其地理位置对地质旅游潜力方面的研究不多。本文的目的是评估和比较Podrinje-Valjevo山脉中受保护的地理位置，以确定它们的当前状态和未来地质旅游发展的潜力。这是通过应用修改后的地理位置评估模型（M-GAM）来完成的。分析并评估了八个地理位置：Kovačevića洞穴，Trešnjica峡谷，Taor Springs，Gradac峡谷，Crna河峡谷，Petnica洞穴，Ribnica峡谷和Ribnica洞穴。研究结果表明，所分析的地理位置具有极大的地缘旅游开发潜力，可以使Podrinje-Valjevo山脉成为地缘旅游目的地。但是，还有很多提升附加值的空间，例如促销，旅游基础设施，游客中心，导游服务和口译小组。结果还表明，在一个地区内水文地质地点和洞穴地质地点的评估之间存在某些差异。因此，为了最大程度地进行比较分析，建议使用该模型来评估相同类型的地理位置。结果还表明，在一个地区内水文地质地点和洞穴地质地点的评估之间存在某些差异。因此，为了最大程度地进行比较分析，建议使用该模型来评估相同类型的地理位置。结果还表明，在一个地区内水文地质地点和洞穴地质地点的评估之间存在某些差异。因此，为了最大程度地进行比较分析，建议使用该模型来评估相同类型的地理位置。