One of them is Carn Euny in Cornwall, which dates back 1,500 years and contains a secret 65ft underground tunnel that has baffled ... Carn Euny was abandoned around AD 400, towards the end of ...
The site was abandoned and much of the station has now disappeared. Hidden and Forgotten took a tour of the site - capturing the tunnel and what's left of the station. They said: "Today ...
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