“The United Nations Educational, Scientific and Cultural Organization (UNESCO) seeks to encourage the identification, protection and preservation of cultural and natural heritage around the world considered to be of outstanding value to humanity.” (quoted from the UNESCO website)
The UNESCO list of World Heritage Sites plays a central role in these efforts. While on the one hand many states and places aim for inclusion on the World Heritage Site list as it can help boost tourism, the official approval also comes with the cost and effort to preserving and protecting the site adequately which can be a costly and complicated issue. Unlike cultural heritage sites, natural heritage is found in a more widespread distribution across the world as their maintenance seems to be less of a barrier towards their preservation. They are also much smaller in number (206 in 2017) and therefore less unequally distributed as their cultural equivalents.