Holywell’s cave disappeared behind a cliff fall in August 2026.

A place people could enter became a place we have to reconstruct from records and photographs. That is a very abrupt change in the way a piece of local history exists.

The National Trust’s statement, reported by ITV on 31 August, described the cave as completely covered and inaccessible. Coastguard and Trust warnings stressed the instability of the area.

The distinction between covered and destroyed matters. Access had gone. The extent to which the internal features survived behind the fall had not been established.

Before discussing what happened to it, I want to understand what was there.

The steps were made by water

The cave contained freshwater springs and a series of pale, stepped pools. Mineral-rich water deposited calcite, gradually building rims and flows which could look almost constructed.

Historic England’s description records an outer cavern, a raised platform, a smaller inner space and rimstone pools. People had cut or improved footholds, but the extraordinary basin-like formations were a product of the water and rock.

That combination helps explain the place’s appeal. A dark sea cave opened into something much more elaborate than the entrance suggested.

It was also fresh water in a setting dominated by the sea. The contrast was part of the experience, even before a saint or a healing story entered it.

A paper droplet hovers above a pale mineral bowl.
Water helped form the cave's remarkable mineral steps. AI-generated editorial interpretation.

People brought their hopes

The cave had a reputation as a healing place.

Historical accounts describe visits by people seeking relief from illness, including children. Robert Hunt’s nineteenth-century collection records the custom of bringing children to Cubert’s well on the first three Wednesdays in May, with gatherings remembered on the scale of a fair.

The language of those accounts belongs to their period. The human reason for coming is easier to recognise.

Someone had an ill child. Someone else knew a place where the water was supposed to help. The journey and the ritual offered something to do.

We do not have to treat the water as a demonstrated cure to take that history seriously. The repeated visits tell us that the place mattered to people at difficult moments in their lives.

The cave’s physical character would have made those visits memorable: water, colour, constrained space and the sea outside.

Holywell has another well

Inland, in the Trevornick valley, stands the Holy Well of St Cubert. Historic England identifies a medieval well house, probably fifteenth-century, restored in 1936.

The National Trust notes uncertainty about which well gave Holywell its name.

That is a complication I rather like. The spectacular cave has an obvious advantage in the imagination, but the quieter inland site belongs in the history too.

They also keep us from turning all the traditions into one perfectly consistent story. Places can share names, saints and healing associations while preserving different histories.

Nearby Cubert and the vanished chapel at High Lanes extend that religious landscape. Four Saints at the Crossroads: The Lost Chapel That Linked Piran, Carantoc and Cubert follows the remembered gathering of relics from neighbouring communities at the crossroads.

The headland is older than the healing story

There are prehistoric barrows above the cave, part of the much longer archaeological landscape around the Kelseys and Poly Joke.

Their presence is compelling. It is also easy to ask them to prove too much.

A Bronze Age burial mound and a medieval holy well show people assigning significance to the same wider headland in very different periods. They do not by themselves establish continuous worship at the cave between those dates.

The earlier occupation and burial history has its own account in Before the Mines: The 10,000-Year History Hidden Between Poly Joke and Holywell. Read beside the well’s story, it adds depth without filling the intervening centuries with an invented tradition.

What a photograph can preserve

Before the collapse, an interior photograph might have been valued chiefly for its colours and unusual formations. Afterwards, the same image could record a feature which could no longer be inspected.

The relationship between the pools, the entrance and the ledges becomes evidence. Dates and camera positions matter.

Historic England’s description serves a similar purpose. It records the arrangement of the site before the latest change in the cliff.

There is a connection here with Perran-in-the-Sands: The Two Churches the Dunes Nearly Swallowed, where religious buildings were covered by sand and repeatedly uncovered. The circumstances are different, but both stories depend on a landscape which changes around the things people want to preserve.

At Holywell, the August warnings make the present practical point clear: keep away from the affected cliff and rockfall, and follow the land manager’s current advice. An old description of entering the cave at low tide is no longer a usable access guide.

The history can be brought back into view without anyone going beneath unstable ground.

We know the cave contained mineral pools, freshwater springs and a long tradition of people arriving with hopes for healing. We know there was another holy well inland.

The rockfall has made those records more valuable.

It has also given us a reason to pay attention to what they actually say.

Sources and further reading

Keep exploring