IUCN World Heritage Outlook 2
2017
Natural World Heritage sites are internationally recognised as having the highest global nature conservation priority. As of November 2017, there are 241 natural and mixed (both cultural and natural) World Heritage sites, representing about 0.1% of the total number of protected areas globally, but yet with a total coverage of 294 million hectares, accounting for 8% of the combined surface of terrestrial and 6% of marine protected areas.