Silbury Hill

AveburyUnited Kingdom 51° N · 1° W Verified Sep 2026

Europe's largest prehistoric man-made mound is not a tomb—no burial has ever been found inside Silbury Hill, despite centuries of tunnels and shafts.

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Silbury Hill Photo: Photograph by Greg O'Beirne · CC BY-SA 3.0
Time needed
1 hour
Entry
Free
Access
View from roadside viewing area; mound closed to public
Best season
Summer (July-August)

Why would thousands of Neolithic workers spend generations piling 240,000 cubic metres of chalk into the tallest prehistoric mound in Europe — and then leave the core empty? That is the riddle of Silbury Hill, a grass-covered giant near Avebury in Wiltshire, United Kingdom. Today you see a smooth, terraced cone rising 30 metres from the Kennet valley floor, its flat top a later medieval alteration. You come not for a tomb, but for the absence at the heart of one of Britain's strangest monuments.

The scale is hard to process. 240,000 cubic metres of chalk and rubble — enough to fill nearly 100 Olympic swimming pools — were moved by hand with antler picks and wicker baskets. Construction radiocarbon dates place the work between about 2470 and 2350 BC, roughly when the sarsens were going up at Stonehenge 25 miles south.

You can't climb it now. English Heritage bans direct ascent to protect the chalk slopes and the rare downland plants that hold them. Instead, you walk the perimeter path and feel the mound's mass against the sky, with West Kennet Long Barrow watching from the ridge to the south.

In wet winters, the surrounding ditch floods and Silbury becomes an island of white chalk reflected in still water — a glimpse of how its builders may have seen it. That image, not any buried king, is the monument's real power.

Researched by the Audiala editorial team from historical records, architectural archives, and local expertise.

What to see

  1. The Mound from the A4 Viewing Platform

    You don't climb Silbury Hill; you stand at its foot and let it do the work. From the A4 layby the flat-topped cone rises 39.3 metres — a 13-storey stack of chalk sloped at 30 degrees. In winter the quarry ditch floods and turns the mound into an island; by summer, molehills along the path exhale white chalk powder — same stone 250 generations hauled into place.

  2. The Ridge at West Kennet Long Barrow

    A kilometre south, on the grass-covered ridge of West Kennet Long Barrow, the view finally makes sense of the valley. From there Silbury becomes a deliberate full stop: pale gold in late summer, bone white in frost. Below, the old Roman road swerves around its base as if even an empire preferred a detour.

  3. The Avebury–Silbury–West Kennet Loop

    Reserve a full morning for the 8.4-kilometre loop from Avebury village. The route follows West Kennet Avenue's sarsen pairs, cuts through sheep pastures, then drops to Swallowhead Springs — the chalk-clear source of the Kennet and the likely reason the hill rises exactly here. That spring never gets warm. From the southern meadow path, skylarks sing over the grass and the mound's reflection shimmers in the flooded ditch; wear waterproof boots from October to March, because the winter moat is real.

Plan your visit

Getting There
Silbury Hill sits directly off the A4, 1 mile (1.6 km) south of Avebury village and 5 miles (8 km) west of Marlborough. Stagecoach West Bus 49 running from Swindon/Devizes stops at Avebury or West Kennett, both roughly a 1-mile walk away. Nearest rail stations: Pewsey (9 miles), Swindon (11 miles), Chippenham (13 miles).
Opening Hours
As of 2026, the viewing area is open every day during daylight hours, year-round, with no gate, ticket, or closed season. The mound itself is permanently off-limits to climbing. Field paths turn waterlogged after heavy rain but remain passable.
Time Needed
Allow 15-20 minutes for the roadside viewpoint, interpretation board, and photographs. A walking loop past West Kennet Long Barrow and the Sanctuary takes 1.5-3 hours; combine it with Avebury stone circle for a half-day.
Accessibility
The A4 viewing platform and interpretation point are level and accessible to wheelchair users and limited-mobility visitors. The lay-by has no toilets; nearest accessible facilities are in Avebury village. Surrounding chalk-grassland footpaths turn muddy, uneven, and slippery after rain.
Cost and Parking
Entry is free. As of 2026, the A4 lay-by car park costs £2 for non-members and is free for English Heritage members. Avebury village's National Trust car park also charges non-members; members park free. No booking or timed entry exists.

History

The Hill That Swallowed Its Secret

Silbury Hill was not built as a tomb. Radiocarbon dates from red deer antler picks show construction began around 2470 BC and continued for four to five generations, ending near 2350 BC. That makes it one of the last great acts of the Avebury ritual landscape, younger than West Kennet Long Barrow and contemporary with the final phase of Stonehenge.

What those generations built is a solid chalk mound 30 metres high — the tallest prehistoric human-made mound in Europe. Records show no burial chamber, no central cist, no trove. That absence has tormented diggers for nearly 250 years.

The turning point

The Tutankhamun Moment That Never Came

For centuries, the surface story was simple: Silbury had to be a royal tomb. Antiquarians from William Camden in 1607 onward assumed a British warlord or Roman general lay at the centre, perhaps with a golden horse. The hill's sheer size seemed to promise a burial to match the pyramids.

Then came the doubt. Colonel Edward Drax sank a vertical shaft from the summit in 1776, finding only a sliver of oak and hollow cavities. Dean John Merewether tunnelled in from the south in 1849 and hit preserved turf and moss. Still, the tomb theory held. In 1968, Professor Richard J. C. Atkinson — already famous for his work at Stonehenge — gambled his reputation on a BBC2 live dig, expecting Britain's Tutankhamun moment.

Under television floodlights, Atkinson's team reopened Merewether's tunnel and reached the core. The revelation was not gold but winged ants, water-snails, and moss. No body. No chamber. The mound was the point. Now, when you look at Silbury's terraced sides, you see not a failed tomb but a communal project so important that generations of people returned to enlarge it — and left the centre deliberately empty.

The Roman Road's Odd Detour

When Roman surveyors laid the road from Silchester to Bath, they aimed the alignment directly at Silbury's silhouette, then swerved the route around its southern base. Excavations in 1867 by Sir John Lubbock and William Cunnington confirmed the detour. A 24-hectare roadside settlement grew up beneath the mound, proof that the hill still commanded the landscape 2,500 years after it was built.

The Summit That Isn't Original

Most visitors assume the flat top is Neolithic. It isn't. Sometime between the 10th and 12th centuries AD, Anglo-Saxon or Norman engineers truncated the rounded summit to create a 30-metre-wide platform, probably for a watchtower or defensive palisade. The hill you see today is a prehistoric mound with a medieval haircut.

Tips for visitors

  • Boots, Not Trainers

    The ditch base and downland paths flood into standing water and slick mud from October to April. Wear waterproof walking boots or wellies if you leave the paved viewing area.

  • Leave the Drone

    Handheld photography from public paths is fine, but English Heritage bans unauthorized drone take-offs and landings at its monuments. Recreational drone flights over Silbury can draw police attention and heritage-crime prosecution.

  • Mind the A4

    The lay-by sits on the A4, a fast rural road. Cross only at the marked footpath point toward West Kennett, and keep dogs on short leads; sheep and cattle graze the fields.

  • Catch Low Light

    Dawn or late afternoon rakes long shadows across the mound and thins traffic on the A4. In winter the ditch floods into a moat-like mirror; July and August frame the hill in wheat fields that occasionally sprout crop circles.

  • Respect the Fence

    Do not climb Silbury Hill. The chalk slope and rare grassland are protected by law, and a 2007–2008 engineering project saved the mound from collapse; trespassers face heritage-offence reports and local anger.

Frequently asked

Is Silbury Hill worth visiting?

Yes, especially if you're already visiting Avebury or Stonehenge. Silbury Hill is the tallest prehistoric human-made mound in Europe—39.3 metres (129 ft), roughly a 13-storey building—and it's 4,400 years old. No burial has ever been found inside, which makes it stranger than any tomb.

Can you climb Silbury Hill?

No, climbing is strictly banned. The chalk slopes are fragile and protected as a Site of Special Scientific Interest. You view the mound from the A4 lay-by viewing area or public footpaths around the base.

How long do you need at Silbury Hill?

Fifteen to twenty minutes if you just pull into the A4 lay-by and read the panels. For the circular walk linking West Kennet Long Barrow and Avebury, set aside 1.5 to 3 hours. The base path gets muddy in winter, so waterproof boots help.

How do I get to Silbury Hill from Avebury?

Walk south from Avebury village for about 1 mile (1.6 km) on footpaths via Beckhampton or West Kennett. By car, take the A4 to the dedicated lay-by just north of the mound; parking costs £2 for non-members. Stagecoach West Bus 49 also stops in Avebury or West Kennett, about a 1-mile walk away.

What is the best time to visit Silbury Hill?

A wet winter day, when the ditch floods and turns the mound into an island. Late summer afternoons are also good—low raking light exposes the spiral ledge on the upper slope. Avoid midday in summer if you want shadows and fewer cars on the A4.

Can you visit Silbury Hill for free?

Yes, viewing is free year-round. The only cost is £2 to park at the A4 lay-by unless you're an English Heritage member. No tickets or booking needed.

What should I not miss at Silbury Hill?

Look for the subtle shelf or terrace on the upper third of the slope, likely the remains of a spiral construction ramp. Then walk southeast to Swallowhead Springs, the source of the River Kennet that probably dictated the hill's placement. For the best view, climb the ridge at West Kennet Long Barrow and look down across the valley.

Sources & attribution 10

Researched and written by the Audiala editorial team from historical records, architectural archives, and local expertise. Last reviewed September 2026.

Built from cited sources · see the method · How we make our guides →

Photo credits (13)
  1. SilburyHill gobeirne — Photograph by Greg O'Beirne — CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0/) — Source: https://commons.wikimedia.org/wiki/File:SilburyHill_gobeirne.jpg
  2. At 40 metres high, Silbury Hill is the tallest prehistoric human-made mound in Europe. - panoramio — Immanuel Giel — CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/) — Source: https://commons.wikimedia.org/wiki/File:At_40_metres_high,_Silbury_Hill_is_the_tallest_prehistoric_human-made_mound_in_Europe._-_panoramio.jpg
  3. Bluebell Wood — Herry Lawford — CC BY 2.0 (https://creativecommons.org/licenses/by/2.0/) — Source: https://commons.wikimedia.org/wiki/File:Bluebell_Wood.jpg
  4. According to legend, Silbury Hill is the resting place of King Sil, sitting on a golden horse. - panoramio — Immanuel Giel — CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/) — Source: https://commons.wikimedia.org/wiki/File:According_to_legend,_Silbury_Hill_is_the_resting_place_of_King_Sil,_sitting_on_a_golden_horse._-_panoramio.jpg
  5. Avebury 2022 August 2 — Jwslubbock — CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/) — Source: https://commons.wikimedia.org/wiki/File:Avebury_2022_August_2.jpg
  6. Autumnal oak near Swallowhead Springs - geograph.org.uk - 281986 — Jim Champion — CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0/) — Source: https://commons.wikimedia.org/wiki/File:Autumnal_oak_near_Swallowhead_Springs_-_geograph.org.uk_-_281986.jpg
  7. At 40 metres high, Silbury Hill is the tallest prehistoric human-made mound in Europe and similar in size to the smaller pyramids of Giza. - panoramio — Immanuel Giel — CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/) — Source: https://commons.wikimedia.org/wiki/File:At_40_metres_high,_Silbury_Hill_is_the_tallest_prehistoric_human-made_mound_in_Europe_and_similar_in_size_to_the_smaller_pyramids_of_Giza._-_panoramio.jpg
  8. Avebury - Silbury Hill - geograph.org.uk - 721279 — Chris Talbot — CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0/) — Source: https://commons.wikimedia.org/wiki/File:Avebury_-_Silbury_Hill_-_geograph.org.uk_-_721279.jpg
  9. Avebury - Silbury Hill - geograph.org.uk - 721260 — Chris Talbot — CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0/) — Source: https://commons.wikimedia.org/wiki/File:Avebury_-_Silbury_Hill_-_geograph.org.uk_-_721260.jpg
  10. Avebury - Silbury Hill - geograph.org.uk - 721290 — Chris Talbot — CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0/) — Source: https://commons.wikimedia.org/wiki/File:Avebury_-_Silbury_Hill_-_geograph.org.uk_-_721290.jpg
  11. Avebury 2022 August 3 — Jwslubbock — CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/) — Source: https://commons.wikimedia.org/wiki/File:Avebury_2022_August_3.jpg
  12. Avebury 2022 August 4 — Jwslubbock — CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/) — Source: https://commons.wikimedia.org/wiki/File:Avebury_2022_August_4.jpg
  13. Avebury Trusloe, Avebury - geograph.org.uk - 1010863 — Brian Robert Marshall — CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0/) — Source: https://commons.wikimedia.org/wiki/File:Avebury_Trusloe,_Avebury_-_geograph.org.uk_-_1010863.jpg

Photos may have been resized or cropped.