Britain once used this 2,000-acre coastal site for secret weapons testing; abandoned military buildings now stand among marshes, birds and deer

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Laboratory 1 at Orford Ness National Nature Reserve, Suffolk. Image Credit: National Trust Images/Justin Minns

The abandoned Pagodas, nuclear testing buildings at Orford Ness. Image Credit: National Trust Images/Chris Lacey

The Black Beacon at Orford Ness. Image Credit: National Trust Images/John Millar

The Island of Secrets exhibition at Orford Ness Image Credit: National Trust Images/John Millar