Bubbling Under
This page lists Tentative Sites that have shown some official activity that may indicate that they are working towards a Nomination. Included are sites that have in the past 8 years had one or more of the following interactions with the WHC or the UNESCO World Heritage Centre:
- Submitted an Incomplete Dossier
- Were Referred at a WHC within the last 3 years (after that period it is considered a new nomination)
- Have taken part in the Upstream Process
- Have asked for funding to prepare a nomination
- Have been Postponed or Adjourned at a WHC
By Country
Per Event
| TWHS | Country | Year of Event | Event |
|---|---|---|---|
| Ancient Khuttal | Tajikistan | 2020 | Incomplete - not examined |
| Ancient Khuttal | Tajikistan | 2021 | Incomplete - not examined |
| Ancient Khuttal | Tajikistan | 2023 | Incomplete - not examined |
| Aqaba Marine Reserve | Jordan | 2025 | Incomplete - not examined |
| Arasbaran Protected Area | Iran | 2017 | Incomplete - not examined |
| Archaeological Site 'Stone Tomb' | Ukraine | 2018 | Upstream Process |
| Asuka-Fujiwara | Japan | 2020 | Upstream Process |
| Augustow Canal | Belarus | 2017 | Preparatory Assistance |
| Augustow Canal | Belarus | 2019 | Preparatory Assistance |
| Bagh-e Babur | Afghanistan | 2024 | Incomplete - not examined |
| Bagh-e Babur | Afghanistan | 2025 | Incomplete - not examined |
| Bashkir Shikhans | Russia | 2025 | Postponed |
| Bimbia et ses sites associés | Cameroon | 2021 | Preparatory Assistance |
| Blagaj | Bosnia Herzegovina | 2021 | Preparatory Assistance |
| Boma-Badingilo Migratory Landscape | South Sudan | 2018 | Upstream Process |
| Brazilian Fortresses Ensemble | Brazil | 2022 | Incomplete - not examined |
| Centre historique de la ville de Gorokhovets | Russia | 2021 | Incomplete - not examined |
| Centre historique de la ville de Gorokhovets | Russia | 2025 | Incomplete - not examined |
| City of Herat | Afghanistan | 2021 | Preparatory Assistance |
| Civil Rights Movement Sites | United States of America | 2019 | Upstream Process |
| Con Moong Cave | Viet Nam | 2022 | Upstream Process |
| Con Moong Cave | Viet Nam | 2024 | Upstream Process |
| Cultural landscape of Bač | Serbia | 2023 | Incomplete - not examined |
| Cultural Landscape of Mahasthan and Karatoya River | Bangladesh | 2018 | Incomplete - not examined |
| Dirre Sheik Hussein Religious, Cultural and Historical Site | Ethiopia | 2020 | Incomplete - not examined |
| Domaine royal de Mbé | Congo (Republic) | 2017 | Preparatory Assistance |
| Eglise catholique d'Ambodifotatra de Sainte Marie | Madagascar | 2020 | Upstream Process |
| Eglise catholique d'Ambodifotatra de Sainte Marie | Madagascar | 2023 | Preparatory Assistance |
| Former M-13 prison/ Tuol Sleng Genocide Museum / Choeung Ek | Cambodia | 2023 | Preparatory Assistance |
| Gdansk - Town of Memory and Freedom | Poland | 2020 | Incomplete - not examined |
| Gdansk - Town of Memory and Freedom | Poland | 2021 | Adjourned |
| Gebel Qatrani Area, Lake Qaroun | Egypt | 2019 | Incomplete - not examined |
| Geometric rock art in Lake Victoria Region (Kenya) | Kenya | 2023 | Preparatory Assistance |
| Geometric rock art in Lake Victoria Region (Tanzania) | Tanzania | 2023 | Preparatory Assistance |
| Geometric rock art in Lake Victoria Region (Uganda) | Uganda | 2023 | Preparatory Assistance |
| Grenadines Island Group | Saint Vincent and the Grenadines | 2019 | Upstream Process |
| Großglockner High Alpine Road | Austria | 2018 | Incomplete - not examined |
| Hin Nam No | Laos | 2021 | Preparatory Assistance |
| Hin Nam No | Laos | 2024 | Incomplete - not examined |
| Huichol Route | Mexico | 2024 | Incomplete - not examined |
| L'ensemble monumental de Tirgu Jiu | Romania | 2019 | Adjourned |
| La Haute Ville d’Antananarivo | Madagascar | 2017 | Preparatory Assistance |
| La Haute Ville d’Antananarivo | Madagascar | 2020 | Upstream Process |
| Lake Chad Cultural Landscape (Nigeria) | Nigeria | 2021 | Postponed |
| Lake Chad Cultural Landscape (Nigeria) | Nigeria | 2023 | Postponed |
| Lake Chilwa Wetland | Malawi | 2019 | Preparatory Assistance |
| Lake Tana Island Monasteries and its Adjacent Wetland | Ethiopia | 2024 | Upstream Process |
| Le Parc National de la forêt du Day | Djibouti | 2018 | Upstream Process |
| Le Parc National de la forêt du Day | Djibouti | 2019 | Preparatory Assistance |
| Le paysage culturel de Diy Gid Biy des Monts Mandara | Cameroon | 2021 | Preparatory Assistance |
| Les Plages du Débarquement, Normandie, 1944 | France | 2019 | Adjourned |
| Malawi Slave Routes and Dr. David Livingstone Trail | Malawi | 2018 | Upstream Process |
| Malawi Slave Routes and Dr. David Livingstone Trail | Malawi | 2019 | Preparatory Assistance |
| Maungaroa Cultural Landscape | Cook Islands | 2024 | Preparatory Assistance |
| Modernist Centre of Gdynia | Poland | 2024 | Incomplete - not examined |
| Monastery of St. Amenaprkich | Iran | 2022 | Postponed |
| Mt. Kumgang | Korea (DPR) | 2018 | Upstream Process |
| Mt. Kumgang | Korea (DPR) | 2019 | Preparatory Assistance |
| Mt. Kumgang | Korea (DPR) | 2021 | Incomplete - not examined |
| Mt. Kumgang | Korea (DPR) | 2023 | Postponed |
| Mt. Mantalingahan Protected Landscape | Philippines | 2019 | Incomplete - not examined |
| Mulanje Mountain Biosphere Reserve | Malawi | 2023 | Incomplete - not examined |
| Murujuga Cultural Landscape | Australia | 2024 | Incomplete - not examined |
| Naletale Cluster of Dzimbabwes | Zimbabwe | 2020 | Upstream Process |
| Naletale Cluster of Dzimbabwes | Zimbabwe | 2021 | Preparatory Assistance |
| Nasqsh-e Rostam and Naqsh-e Rajab | Iran | 2022 | Postponed |
| Nelson Mandela Legacy Sites | South Africa | 2023 | Postponed |
| NOSYnakà | Madagascar | 2020 | Upstream Process |
| Oc Eo - Ba The | Viet Nam | 2022 | Upstream Process |
| Parc national de Zakouma | Chad | 2017 | Incomplete - not examined |
| Parc national de Zakouma | Chad | 2021 | Incomplete - not examined |
| Paysage culturel du Lac Tchad (Cameroon) | Cameroon | 2021 | Postponed |
| Paysage culturel du Lac Tchad (Cameroon) | Cameroon | 2023 | Postponed |
| Paysage culturel du Lac Tchad (Chad) | Chad | 2021 | Postponed |
| Paysage culturel du Lac Tchad (Chad) | Chad | 2023 | Postponed |
| Paysage culturel du Lac Tchad (Niger) | Niger | 2021 | Postponed |
| Paysage culturel du Lac Tchad (Niger) | Niger | 2023 | Postponed |
| Pereslavl-Zalessky | Russia | 2023 | Postponed |
| Port of Banbhore | Pakistan | 2020 | Incomplete - not examined |
| Port of Banbhore | Pakistan | 2021 | Incomplete - not examined |
| Port of Banbhore | Pakistan | 2023 | Incomplete - not examined |
| Qoahito Cultural Landscape | Eritrea | 2018 | Upstream Process |
| Qoahito Cultural Landscape | Eritrea | 2019 | Preparatory Assistance |
| Sacred Landscapes of Tigray | Ethiopia | 2017 | Preparatory Assistance |
| Sharjah: the Gate to Trucial States | United Arab Emirates | 2018 | Incomplete - not examined |
| Silk Roads Sites in Tajikistan | Tajikistan | 2019 | Incomplete - not examined |
| Silk Roads Sites in Uzbekistan | Uzbekistan | 2019 | Incomplete - not examined |
| Sites de la métallurgie ancienne du fer de Bassar | Togo | 2023 | Upstream Process |
| Sites historiques et paysages culturels du Manden | Mali | 2019 | Incomplete - not examined |
| Sites historiques et paysages culturels du Manden | Mali | 2019 | Upstream Process |
| Sitio Arqueológico de la Villa La Isabela | Dominican Republic | 2018 | Upstream Process |
| SS. Boris and Gleb (Kalozha) Church in the city of Hrodna | Belarus | 2020 | Upstream Process |
| Sultanats Historiques des Comores | Comoros | 2019 | Preparatory Assistance |
| Sultanats Historiques des Comores | Comoros | 2023 | Preparatory Assistance |
| Tenzug - Tallensi settlements | Ghana | 2017 | Preparatory Assistance |
| Testament of Kenozero Lake | Russia | 2023 | Incomplete - not examined |
| The Ancient Walled Oases of Northern Arabia | Saudi Arabia | 2021 | Incomplete - not examined |
| The archeological site of Tanais | Russia | 2023 | Postponed |
| The architectural legacy of Rogelio Salmona | Colombia | 2023 | Preparatory Assistance |
| The Architectural Works of Alvar Aalto | Finland | 2022 | Upstream Process |
| The broader region of Mount Olympus | Greece | 2024 | Incomplete - not examined |
| The Central Axis of Beijing (including Beihai) | China | 2020 | Upstream Process |
| The Colonial Transisthmian Route of Panamá | Panama | 2020 | Upstream Process |
| The Colonial Transisthmian Route of Panamá | Panama | 2023 | Incomplete - not examined |
| The Colonial Transisthmian Route of Panamá | Panama | 2024 | Referred |
| The Historical Port City of Izmir | Turkiye | 2022 | Upstream Process |
| The Memorial of Chatam Sófer | Slovakia | 2022 | Upstream Process |
| The Old Town of Jakarta | Indonesia | 2017 | Incomplete - not examined |
| The Olive Grove Landscapes of Andalusia | Spain | 2024 | Incomplete - not examined |
| The Ringed Seal Archipelagos of Lake Saimaa | Finland | 2020 | Upstream Process |
| The Sado complex of heritage mines, primarily gold mines | Japan | 2023 | Incomplete - not examined |
| The Underwater City of Port Royal | Jamaica | 2024 | Incomplete - not examined |
| Tilaurakot | Nepal | 2019 | Upstream Process |
| Travertine waterfalls in Martin Brod - Una National Park | Bosnia Herzegovina | 2021 | Preparatory Assistance |
| Travertine waterfalls in Martin Brod - Una National Park | Bosnia Herzegovina | 2024 | Incomplete - not examined |
| Wadi Wurayah National Park | United Arab Emirates | 2024 | Incomplete - not examined |
| Wadi Wurayah National Park | United Arab Emirates | 2025 | Postponed |
| Yapese Disk Money Regional Sites | Micronesia | 2021 | Preparatory Assistance |
| Yesemek Quarry and Sculpture Workshop | Turkiye | 2018 | Upstream Process |