The PMPPM project was built to meet the need to develop and promote in a sustainable and integrated manner, the Pyrenees Mont Perdu site inscribed on the World Heritage List since 1997. This property, whose territory is situated between France and Spain, is managed in a cross-border way by a joint steering committee composed of representatives of both countries. PMPPM 2 is based on the site management plan achieved during the first project PMPPM funded under the POCTEFA 2007-2013. The main issue identified in the plan, through the conservation of the property, is its development and attractiveness. This is about improving the knowledge, the conservation, the development and the appropriation of the property from civil society and site managers to strengthen this attractiveness. The novelty of the PMPPM 2 project is the implementation of the management plan and thus the development of more diversified and structuring actions through a cross-border governance that will be reinforced.