AN art teacher's stunning photo of Blenheim Palace's Grand Bridge will take centre stage in a new exhibition at the UNESCO World Heritage Site.

Cereta Drewett's abstract image was selected by the Duke and Duchess of Marlborough as the centrepiece of the 'Beautiful Blenheim' outdoor photography exhibition, which starts on Thursday.

The Witney resident entered her creation in a photography competition ahead of the event and it caught the attention of the Duke and Duchess.

The Duke said: “My eyes immediately fell on the photo of the Grand Bridge - 'Is it a photo or a painting?'.

"That is why I selected it as the winning image that depicts Vanbrugh's magnificent Grand Bridge in such an original and beautiful way."

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He added: “It was exciting to see how the photographers had captured the unique beauty of our UNESCO World Heritage Site."

Ms Drewett aimed to 'emphasise the architectural features' of the bridge through an in-camera multiple exposure as she tried to create the effect of an abstract print.

The competition was run alongside the International Garden Photographer of the Year contest, which has some entries in the exhibition.

The partnership aimed to draw attention to the beauty of the palace and its unique parkland.

Visitors can enjoy 'Beautiful Blenheim' for free until August 20 as part of their visit to the site.