A rainbow-coloured sea cave that was believed to have special healing powers and featured in Poldark has collapsed.
The multicoloured grotto was once one of Britain’s most mysterious sites and attracted huge numbers of visitors during the 17th and 18th centuries.
The area is named after the cave’s healing waters, where pilgrims, cripples and sick people would make their way to the cave to drink from the ‘holy well’.


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