21/08/2026
Beneath the surface of our ocean, seas, rivers and lakes lies an extraordinary part of humanity's cultural heritage, from ancient shipwrecks and submerged settlements to archaeological sites and living traditions and knowledge connected to water.
Often unseen and difficult to access, this heritage bears witness to centuries of voyages, exchanges and shared histories. Yet it is increasingly vulnerable to looting, illicit trafficking, climate change, pollution and other growing pressures.
On 21 August, the first International Day for Underwater Cultural Heritage calls for stronger international cooperation to protect this irreplaceable source of knowledge and intercultural dialogue, and to ensure that its protection is fully integrated into the sustainable management of oceans, coastal areas and inland waters.
This year also marks 25 years since the adoption of UNESCO's 2001 Convention on the Protection of Underwater Cultural Heritage, which provides a framework for international cooperation, responsible research and the protection of submerged heritage from commercial exploitation and illicit trafficking.
Together with Member States, researchers, local communities and partners, UNESCO is working to safeguard for the benefit of humanity and future generations.
Discover more: https://www.unesco.org/en/days/underwater-cultural-heritage
