Rainbow-coloured ‘forgotten’ Poldark sea cave lost forever in cliff fall

A rock slide happened overnight and was noticed by locals (Picture: Shutterstock) 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’. In recent decades it has become largely secluded and unknown, and most tourists visiting Holywell, Cornwall, were unaware of it. However, it seems that the natural phenomenon may now be hidden forever after the entrance to the cave was blocked by a rock fall overnight. Sign up for all of the lates