A cultural landscape is a complex and integrating concept with both material–physical and immaterial substance. Nevertheless, even today, the strategies for the protection and promotion of cultural landscapes are concentrated only at their material cultural elements, separated from their immaterial existence, or even from the natural environment in which they are placed. This study investigates the correlation of the tangible historical and natural heritage of a cultural landscape with its intangible content, as a spatial planning tool for its sustainable development. The proposed methodology was applied in the region of the Mani Peninsula, located in the southern Peloponnese, in Greece. During the documentation stage, literature research and fieldwork provided descriptive information, which was classified through standardization processes. GIS management and analysis procedures were used among the different layers of data of the current preservation state and the existing development frameworks for the study area. New thematic cultural routes are proposed to connect tangible cultural heritage and environmental values of the region under study, with the landscape’s geomorphological characteristics and intangible content. Protected areas are also proposed for the protection of monuments and sites of historical or natural importance. The results of this study demonstrate that, through integrated strategic planning for the development of cultural activities and networks, which incorporates the principles of spatial and urban planning, not only is the protection of the natural and cultural wealth of the region achieved, but also a balanced economic development and social cohesion, which ultimately leads to sustainable development.

The geometric documentation of characteristic parts of the walls of the Sarantapicho Acropolis and Erimokastro Acropolis in Rhodes, Greece, in accordance with GIS modeling and analysis operations are utilized to accomplish the mapping of building materials, decay patterns and conservation interventions of both investigated sites. Ortho-rectified images as base-maps and the building materials and decay data, comprised the spatial and attribute data sets. Building materials and decay data were collected after the application of non-destructive testing and evaluation techniques in situ and analytical techniques in lab after sampling. The result was the development of thematic maps of building materials and decay. Moreover, using geoprocessing analysis the thematic map of conservation interventions was produced incorporating attribute data from both building materials and decay themes. This multidisciplinary approach provides the basis for the compatibility assessment of conservation interventions (whenever applied) and for monitoring of the preservation state of building materials, contributing decisively to the sustainable protection of both investigated sites.