Holywell Cave, a scenic spot on Cornwall's Holywell Bay known for its colorful rock formations and historical significance, has been permanently sealed by a dramatic cliff fall. The cave, also referred to as St. Cuthbert's Cave, was a popular destination for tourists and locals alike and gained wider recognition for its appearance in the BBC drama series Poldark.

The collapse, which reportedly occurred on Sunday, August 30, has covered the cave entrance with hundreds of tonnes of rock and debris. The unique mineral deposits that gave the cave its distinctive colorful appearance are now hidden from view.

Holywell Cave is associated with a legend of a holy well, fed by a natural spring, which medieval pilgrims believed possessed healing properties. According to local lore, the water's restorative abilities are linked to the legendary body of St. Cuthbert being brought to the cave in 995 AD, with the water gaining its powers after his bones touched it.

The cave and its well are accessible only during low tide. Its appearance in Poldark, particularly in series four and five during scenes involving characters Drake Carne and Morwenna, significantly boosted its popularity.