Multilevel caves (> 20.5 km) with historic entrances, unique habitat for troglobitic species, example of regeneration and valorisation. UNESCO submitted 2015 (natural). Area: Postojna Caves, managed by a joint-stock company under the Regulation on Concession and generate social, economic and cultural development. Scale: Regional (112.000 inh). Projects: Municipal Spatial Plan (2010) and the Regional Development Programme of Notranjsko-Kraška region (2007-2013/ 2014-2020). Funding: Public