This paper analyses Heritage management and tourism in Brandberg National Monument, Namibia. Heritage sites are composed of natural and cultural assets that are characterized as common-pool resources. Exclusion from site is very costly and rivalness leads to conflicts over resources and overexploitation. However, tourism option use of Heritage sites can bring sustainable development. To assure sustainable Heritage tourism, institutions have to emerge to regulate and coordinate relations between various stakeholders that often have opposite interests. New institutional approach is used to study conditions that permit good governance of tourism in natural and cultural sites, particularly in Brandberg National Monument. We show that actors, concerned with Brandberg mountain development, follow rent-seeking strategies and compete for capturing revenues. Communities managed the area for years before the State took over in 2005. We give reasons of this State re-appropriation and analyse reactions from local communities.  Finally, we propose a new institutional arrangement that would involve local actors and would permit an efficient governance of tourism in Brandberg but also in other Heritage sites in general. Keywords: Heritage Site, tourism, common-pool resource, rent-seeking strategies, Brandberg, Namibia.