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St Mary's, Isles of Scilly TR21 0NY | 0370 333 1181
On the open downland above Porth Hellick Bay, on the south-eastern side of St Mary's, lies one of the most significant concentrations of Bronze Age burial monuments anywhere in the Isles of Scilly: a dispersed cemetery of seven entrance graves and two low cairns, of which the Porth Hellick Down Burial Chamber is by far the largest and best preserved.
Built around 1500 BC, the chamber is a classic example of the entrance grave, a distinctive form of Bronze Age burial monument found in unusually high concentrations across the Isles of Scilly compared with the Cornish mainland. Its substantial mound, roughly 39 feet in diameter and standing up to five feet high in places, encloses a chamber some twelve feet long, roofed with four surviving capstones and entered via an unusual angled passage marked by a distinctive projecting jambstone.
What sets Porth Hellick Down apart from the islands' other burial sites, such as Bant's Carn or the Innisidgen chambers, is the sheer scale of the surrounding cemetery. Rather than standing alone, the main chamber forms the centrepiece of a wider funerary landscape scattered across the down, six further entrance graves and two low cairns, most now reduced to low mounds or scatters of stone, but together representing a burial ground used and added to over a considerable span of the Bronze Age.
The chamber was excavated in 1899, one of a number of investigations of the islands' prehistoric monuments carried out around the turn of the 20th century, and today the site is cared for by English Heritage, free to visit and reached via footpaths across the open down, with fine views out over Porth Hellick Bay towards the open Atlantic.
Location Map
Visitor Guide
Porth Hellick Down lies on the south-eastern side of St Mary's, reached via footpaths crossing open downland above Porth Hellick Bay. There is no dedicated parking at the site itself, and visitors typically approach on foot from Old Town or from the network of coastal and inland footpaths that cross this part of the island, making comfortable, grippy footwear well worth having underfoot on the often uneven, gorse-studded ground.
The main chamber is easily the most substantial monument on the down, its mound and capstones clearly visible from some distance, but visitors with time to explore further will find the scattered remains of the wider cemetery worth seeking out too, a rewarding way to appreciate just how significant this stretch of downland was as a burial landscape across the Bronze Age. The views from the down, out over Porth Hellick Bay and the open Atlantic beyond, add considerably to the experience.
Allow around thirty minutes to explore the main chamber and its surroundings, longer if seeking out the wider scatter of smaller graves and cairns across the down. There are no facilities at the site itself, but Old Town and Hugh Town, both a manageable walk away, offer shops, cafes and toilets for a fuller day exploring this quieter side of St Mary's.
History
Porth Hellick Down Burial Chamber was constructed around 1500 BC, during the early Bronze Age, as part of a wider tradition of entrance-grave building that is unusually well represented across the Isles of Scilly compared with the Cornish mainland, where such monuments are considerably rarer. Entrance graves of this type consist of a stone-built chamber, roofed with substantial capstones, set within a round mound and reached via a short entrance passage, and they are thought to have served as collective burial places used and revisited over an extended period rather than single interments.
The Porth Hellick Down chamber is notable both for its scale, a mound around 39 feet in diameter and standing up to five feet high, enclosing a chamber some twelve feet long, and for the unusual design of its entrance, an angled passage marked by a distinctive projecting jambstone rather than the more typical straight approach seen at other island sites. Four capstones survive in place over the chamber, making it one of the better-preserved examples of its type on St Mary's.
What makes the site especially significant, however, is its position within a much larger funerary landscape. Rather than standing in isolation, the main chamber is the largest and most prominent element of a dispersed cemetery spread across the down, comprising six further entrance graves and two low cairns, several now reduced to little more than low mounds or scatters of displaced stone through centuries of erosion and, in some cases, earlier antiquarian disturbance. Together they represent one of the most extensive concentrations of Bronze Age burial monuments anywhere in the Isles of Scilly, comparable in scale to the cemetery on Knackyboy Carn on neighbouring St Martin's.
The main chamber was excavated in 1899, part of a period of renewed antiquarian interest in the islands' prehistoric monuments around the turn of the 20th century, alongside investigations at other Scillonian sites including Bant's Carn. Today Porth Hellick Down Burial Chamber and its surrounding cemetery are cared for by English Heritage, a landscape of real archaeological importance that continues to shape understanding of Bronze Age burial practice on the islands.
The sheer density of entrance graves clustered on this single stretch of downland has long interested archaeologists studying Bronze Age Scilly, since it suggests Porth Hellick Down functioned as a dedicated burial ground for a community, or succession of communities, over a considerable period rather than as a single, isolated act of monument-building. Comparable clusters exist elsewhere in the islands, notably at Knackyboy Carn on St Martin's, but the combination of scale, preservation and the unusual angled entrance of the main chamber makes Porth Hellick Down one of the most studied and archaeologically significant of these Scillonian cemeteries.
Important Features
- The main entrance grave: a mound around 39 feet across enclosing a twelve-foot chamber, roofed with four surviving capstones.
- The angled entrance passage: an unusual design marked by a distinctive projecting jambstone.
- The wider cemetery: six further entrance graves and two low cairns scattered across the down.
- Its scale: one of the largest concentrations of Bronze Age burial monuments in the Isles of Scilly.
- Views over Porth Hellick Bay: outlooks across the bay towards the open Atlantic.
- 1899 excavation: part of a wave of antiquarian investigation of the islands' prehistoric sites.
Visitor Information
Parking
No dedicated parking at the site; reached on foot via footpaths from Old Town or across the down.
Facilities
No facilities at the site itself. Refreshments and toilets are available in Old Town and Hugh Town.
Disabled Access
Not suitable for wheelchairs. The site is reached via footpaths across open, uneven downland.
- Opening times: open any reasonable time during daylight hours, year-round.
- Public transport: limited island bus services connect Hugh Town with Old Town.
- Toilets: none at the site; facilities are available in Old Town and Hugh Town.
- Food and drink: shops and cafes in Old Town and Hugh Town.
- Shop: no shop at the site; shops are available in Hugh Town.
- Dogs: welcome on leads.
- Booking: not required — free entry, no ticketing.
- Family facilities: none on site; uneven downland terrain is unsuitable for pushchairs.
- Additional access: visitors are asked not to climb on or disturb the stonework.
- Visit duration: around thirty minutes, longer if exploring the wider cemetery.
Things to Do Nearby
Bant's Carn Burial Chamber and Halangy Down Ancient Village
St Mary's
A Bronze Age entrance grave alongside an Iron Age and Roman-period village on the opposite side of St Mary's.
Find Out MoreInnisidgen Lower and Upper Burial Chambers
St Mary's
Two further Bronze Age entrance graves, including the best-preserved example on the islands.
Find Out MorePorth Hellick Bay
St Mary's
A quiet, sheltered bay on the south-eastern coast of St Mary's, directly below the burial chamber.
Find Out MoreOld Town, St Mary's
St Mary's
A historic hamlet with shops, cafes and Old Town Church, a short walk from the burial chamber.
Find Out MoreIsles of Scilly
Off the Cornish coast
Britain's most south-westerly archipelago, with white sand beaches and island-hopping boat trips.
Find Out MoreFrequently Asked Questions
Official English Heritage Site
For the latest access information, events and any temporary restrictions, check the official English Heritage page for Porth Hellick Down Burial Chamber before you travel.
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Page last updated: 25 August 2026. Images to follow.