▲Blenheim Palace is a monumental English palace situated in Oxfordshire.

▲Kew Gardens houses the largest botanical collection in the world.

▲Hadrian’s Wall is a defensive fortification built by the Romans in 122 CE.

▲Bath was founded by the Romans and its history is clearly visible.

▲The Tower of London is a monumental castle located on the north bank of the River Thames.

▲Westminster Abbey is London's most famous landmark. Over 3000 individuals have been buried or commemorated here.

▲Durham Castle and Cathedral are the largest examples of Norman architecture in England.

▲The 'Old Town' is home to medieval fortresses and the 'New Town' was constructed during the Georgian era between 1767 and 1890 as a collection of seven new towns.

▲Stonehenge is not only a UNESCO Heritage Site, but also one of the best known ancient wonders of the world.

▲The coast in East Devon displays a sequence of Triassic, Jurassic, and Cretaceous rock formations displaying 185 million years of Earth's history.

▲This collection of castles is described as the finest example of military architecture in Europe.

▲This Kent cathedral displays a mix of Roman and Gothic architecture. Following the murder of Archbishop Thomas Becket in 1170 CE, the cathedral became a place of pilgrimage.

▲St Martin’s Church and the ruins of St Augustine’s Abbey together reflect the history of both Catholicism and Protestantism in Britain.

▲Its valleys were modelled by glaciers during the ice age.

▲Blaenavon Industrial Landscape was the world's largest producer of iron and coal in the 19th century.

▲The group of Neolithic monuments on Orkney date back 5,000 years.

▲The iron bridge across the gorge was the first in the world and stands as a symbol of the Industrial Revolution.

▲St George in Bermuda is one of the earliest English settlements and the oldest English town in the 'New World'.

▲The city of Liverpool became the main port for the mass movement of people to the 'New World'.

▲The Giant's Causeway and Causeway Coast was formed by volcanic activity over 50 million years ago.

▲Saltaire in West Yorkshire is a well-preserved 19th century industrial village.

▲The Ruins of Fountains Abbey is one of the few 18th-century gardens to survive in its original form.

▲The cluster of buildings and the park in which they are located were built over many decades in the 17th and 18th centuries.

▲St Kilda is an isolated cluster of islands off the coast of Scotland.

▲The Forth Bridge opened in 1890 and continues to operate as a passenger and freight rail bridge to this day.

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New Lanark was a purpose-built mill village in Scotland that was founded in 1785.

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The Pontcysyllte Aqueduct and Canal were engineered by the famous civil engineer Thomas Telford. The project was completed at the end of the 18th century.

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In 1975, the United Nations Educational, Scientific and Cultural Organization (UNESCO) began their mission of "the identification, protection and preservation of cultural and natural heritage around the world considered to be of outstanding value to humanity.” Today, there are over 1,000 around the world, with over 25 of them in the UK.

In this gallery, click through for a look at the UK's most treasured sites.