These sites have yet to be added because places are lacking for them:
Mount Emei Scenic Area, including Leshan Giant Buddha Scenic Area
Uvs Nuur Basin *
The Sundarbans
Pyrénées - Mont Perdu *
Nanda Devi and Valley of Flowers National Parks
Golden Mountains of Altai
Mount Taishan
Dja Faunal Reserve
Meteora
Mount Wuyi
Puerto-Princesa Subterranean River National Park
Cliff of Bandiagara (Land of the Dogons)
Mount Nimba Strict Nature Reserve *
Mount Huangshan
Göreme National Park and the Rock Sites of Cappadocia
Hierapolis-Pamukkale
High Coast / Kvarken Archipelago *
Río Plátano Biosphere Reserve
Selous Game Reserve
Central Highlands of Sri Lanka
Putorana Plateau
China Danxia
Ogasawara Islands
Wadi Rum Protected Area
Lakes of Ounianga
Chengjiang Fossil Site
Western Ghats
Xinjiang Tianshan
Stevns Klint
Western Tien-Shan *
Hubei Shennongjia
The Ahwar of Southern Iraq: Refuge of Biodiversity and the Relict Landscape of the Mesopotamian Cities
Sanganeb Marine National Park and Dungonab Bay – Mukkawar Island Marine National Park
Landscapes of Dauria *
Fanjingshan
Chiribiquete National Park – “The Maloca of the Jaguar”
Migratory Bird Sanctuaries along the Coast of Yellow Sea-Bohai Gulf of China (Phase I)
Chaîne des Puys - Limagne fault tectonic arena
Australian Fossil Mammal Sites (Riversleigh / Naracoorte)
Thungyai-Huai Kha Khaeng Wildlife Sanctuaries
Wulingyuan Scenic and Historic Interest Area
Taï National Park
Swiss Alps Jungfrau-Aletsch
Monte San Giorgio *
Phong Nha-Ke Bang National Park
Islands and Protected Areas of the Gulf of California
Shiretoko
Wadi Al-Hitan (Whale Valley)
West Norwegian Fjords – Geirangerfjord and Nærøyfjord
Sichuan Giant Panda Sanctuaries - Wolong, Mt Siguniang and Jiajin Mountains
South China Karst
Joggins Fossil Cliffs
Lagoons of New Caledonia: Reef Diversity and Associated Ecosystems
Mount Sanqingshan National Park
Saryarka – Steppe and Lakes of Northern Kazakhstan
Swiss Tectonic Arena Sardona
Ancient and Primeval Beech Forests of the Carpathians and Other Regions of Europe *
Messel Pit Fossil Site
Srebarna Nature Reserve

https://jumear.github.io/stirfry/iNat_observation_slideshow.html?order_by=random&per_page=200&project_id=world-heritage-natural-site-observations

https://jumear.github.io/stirfry/iNat_observation_grid_widget.html?order_by=votes&place_id=any&project_id=world-heritage-natural-site-observations&columns=16&rows=8&view=species

Thought I would add a journal post where users can post and add to, in the comments, resources with regards to World Heritage Natural Sites:
Discover the 252* natural and mixed sites on the World Heritage List

Markdown hint
[Discover the 252 natural and mixed sites on the World Heritage List ] immediately followed by (https://www.iucn.org/theme/world-heritage/natural-sites) will just show the title without the link showing as above

https://jumear.github.io/stirfry/iNatAPIv1_observations_species_counts.html?project_id=world-heritage-natural-site-observations
For those who wish to create a list. It takes a few seconds to generate once you are there.