Natural World Heritage is a site is an area which was naturally grown there, Basically nothing man made.
There are 206 natural World Heritage sites.
Milford Sound/Piopiotahi is a natural world heritage site. It is a fjord with two waterfalls.
A mixed site has both natural and cultural criteria for a world heritage site.
Convention concerning the Protection of World Cultural and Natural Heritage
Natural
A mixed World Heritage site is a site that has both cultural and natural significance to the world. These sites fall under many of the 10 criteria that UNESCO has for a world heritage site. They must meet at least one of the cultural and natural criteria. There are 31 mixed world heritage sites in the world. Some of these sites include the Historic Sanctuary of Machu Picchu in Peru and Mount Athos in Greece.
The Great Barrier reef is a natural World Heritage site.
Natural sites would be the Great Barrier Reef. Cultural world heritage sites would be places connected to people such as the Sydney Opera House.https://simple.wikipedia.org/wiki/List_of_World_Heritage_Sites_in_Australia
Because Uluru is one of very few that is both a natural and cultural World Heritage Site.
At the end of 2012, there were 962 World Heritage Sites; 744 cultural, 188 natural and 30 mixed.
As of 2014, there are no World Heritage Sites within Johannesburg. The closest sit to Johannesburg is Vredefort Dome which is 120 km southwest of the city. This natural site was given its World Heritage status in 2005.
the great barrier reef was listed as a world heritage site for its natural beauty