Travel cost method is used to estimate the value of the Port-Cros National Park, a marine and terrestrial natural protected area situated on and around a Mediterranean island in the South of France. We used a sample of 600 visitors surveyed on several places on site. In order to get appropriate time and travel costs for multi-destination travels, a motivation scale is introduced to weight the costs according to the influence of the Park in the decision to visit the region. The value of time is estimated following two methods and the results are discussed. The values obtained for consumer surpluses emphasize the uniqueness of the site which can be related to the insular situation and the fact that a marine protected area accessible to a large number of visitors remains exceptional.