Celebrating some amazing milestones for UNESCO

UNESCO was established on 16 November 1945, when representatives from 44 nations gathered in London to create a new international organisation dedicated to promoting peace through cooperation in education, science, culture and communication.

The United Kingdom was among UNESCO’s founding members and ratified its Constitution in February 1946. The Constitution came into force on 4 November 1946 following ratification by the required number of countries.

Last year, the celebration of UNESCO’s 80th anniversary, highlighted the important contribution that UNESCO World Heritage Sites, Biosphere Reserves, Global Geoparks, Creative Cities and academic networks make to conservation, education, sustainable development and thriving local communities.

Eight decades on, UNESCO’s founding mission remains as relevant as ever. From protecting cultural and natural heritage to advancing scientific cooperation, supporting education and safeguarding freedom of expression, its work continues to address some of the most pressing global challenges of our time.

A significant milestone for the UK followed in November 1986, when the first UK World Heritage Sites were inscribed by the World Heritage Committee. The seven inaugural sites were St Kilda; Stonehenge, Avebury and Associated Sites; Studley Royal Park including the Ruins of Fountains Abbey; the Castles and Town Walls of King Edward in Gwynedd; the Giant’s Causeway and Causeway Coast; Ironbridge Gorge; and Durham Castle and Cathedral.

As 2026 marks the 40th anniversary of these first UK World Heritage inscriptions, we celebrate the enduring legacy of these exceptional places and their continued contribution to conservation, education, local communities and sustainable tourism. Discover more about this milestone at World Heritage Anniversaries | World Heritage UK and take a virtual journey through some of these remarkable places in this World Heritage UK video.

Today, the UK is home to 35 World Heritage Sites across all four nations of the United Kingdom and four Overseas Territories. 

We are proud to celebrate our own World Heritage Site journey, with 2026 marking the 20th anniversary of the inscription of the Cornwall and West Devon Mining Landscape World Heritage Site, a globally significant testament to the innovation, industry and communities that helped shape the modern world.