Overview
Knowth (Irish: Cnoghbha) sits on a gentle rise beside a sweeping bend in the River Boyne, roughly 9 km west of Drogheda and a 45-minute drive north of Dublin. The monument is a massive earthen mound, measuring approximately 80 m east–west and 95 m north–south, and is ringed by 127 towering kerbstones. Two independent passages run east–west through the interior, each terminating in its own burial chamber. As the largest passage-tomb complex in Europe, Knowth holds more than a third of all known megalithic art on the continent.
The site forms part of the Brú na Bóinne archaeological landscape, a UNESCO World Heritage area that also encompasses Newgrange and Dowth. While interior access to Knowth’s chambers remains restricted to preserve the fragile stonework, visitors explore the exterior pathways, climb to a summit viewing platform, and piece together the site’s story through a dedicated exhibition at the Brú na Bóinne Visitor Centre.
History & Significance
Neolithic origins (c. 3200 BC)
Construction at Knowth dates to around 3200 BC, placing it in the same era as the other major Boyne Valley tombs. Building the mound required moving thousands of tonnes of earth and carefully positioning massive greywacke stones quarried from the Clogherhead area, roughly 20 km away. The eastern passage stretches about 40 m – making it the longest known megalithic corridor in Western Europe – and ends in a cruciform chamber with three side recesses. The western passage measures approximately 34 m and terminates in a narrower chamber that originally contained a stone basin.
The art of the stones
Excavations during the 1960s and 1970s revealed over 200 decorated stones, a record for any prehistoric site in Western Europe. The carvings feature spirals, lozenges, concentric circles, and serpent-like patterns. One orthostat even bears what researchers consider the oldest known illustration of the moon. Many designs are deliberately placed on the rear faces of the kerbstones, pointing to a tradition of “hidden art” that may have held ritual or seasonal significance.
Later centuries
After the Neolithic period, the mound gradually fell into disuse. By the Bronze Age, the entrances were deliberately sealed, and the site lay quiet for centuries. In the late Iron Age and early Christian era, Knowth was repurposed as a hill-fort, with defensive ditches cut into the mound’s base and summit. Early Christian graffiti and Ogham inscriptions were later carved into the eastern chamber stones. The site eventually served as a Norman motte in the 12th century and later as a grange for Mellifont Abbey. The state acquired the land in 1939, beginning a long process of archaeological investigation and public presentation.
What to See & Do
- The Great Mound & Kerbstones – Walk the paved perimeter to examine the 127 standing stones. Many still display intricate petroglyphs, best viewed with the provided guide map.
- Twin Passages – Your guide will mark the entrance points and explain the original equinox alignments. You’ll learn how Neolithic builders constructed roofed corridors nearly 5,000 years ago.
- Interpretive Exhibition – The modern visitor centre houses replica stones, interactive displays, and a documentary on the original excavations. It also showcases recent findings, including detailed analysis of the carved lunar map.
- White Quartz Facade – Near the western entrance, a scatter of white quartz stones lies on the ground. These are remnants of the original facing that would have caught and reflected the morning sun.
- Satellite Tombs – Eighteen smaller mounds surround the main cairn. Though many are now low earthworks, they outline a vast ceremonial landscape that once stretched across the valley.
- Summit Views – The 12 m high viewing platform offers sweeping panoramas of the Boyne Valley, including clear sightlines to the nearby Hill of Tara and the ancient route of the Boyne River.
Photography Tips
- Early Light – The western quartz scatter glows in the morning sun. Arrive for the first tour slot to capture it before the light shifts.
- Equinox Alignments – Visiting around March 20 or September 22 allows you to photograph the sunrise directly over the eastern passage entrance.
- Wide-Angle Landscapes – From the summit platform, a wide lens captures the curve of the Boyne River and the surrounding farmland, framing the mound within its original setting.
Practical Information
Opening hours & tickets
All visits to Knowth begin at the Brú na Bóinne Visitor Centre. Tours depart at fixed intervals and operate only when the centre is open.
- Jan, Oct–Dec: 09:00–16:15 (last admission 15:30)
- Feb–Apr: 09:30–16:45 (last admission 16:00)
- May–Aug: 09:00–17:45 (last admission 17:15)
- Sep: 09:00–17:15 (last admission 16:45)
- Note: Knowth is closed from early November to late February each year. Exact dates vary, so check the official site before planning your trip.
Tickets are strictly limited and must be booked online in advance.
- Knowth Tour + Exhibition: €10 adult, €8 senior, €5 child (12–17), free under 12, €5 student, €25 family.
- Visitor Centre Exhibition only: €5 adult, €4 senior, €3 child, free under 12, €3 student, €13 family.
- Combined Newgrange + Knowth Tour: €18 adult, €16 senior, €12 child (12–17), free under 12, €12 student, €48 family. Book via the official portal: https://brunaboinne.admit-one.eu/
Getting there
- By car: Take the M1 north from Dublin and exit at Junction 9 (Donore). Follow signs to the Brú na Bóinne Visitor Centre (Eircode A92 EH5C). The drive takes approximately 45 minutes. Free parking is available on site.
- By public transport: Bus 163 connects Drogheda (with onward links to Dublin) to the Visitor Centre. Services run several times daily, with the final departure timed before the last tour slot.
- On-site transit: A shuttle bus transports visitors from the exhibition centre to the Knowth monument and back. Allow about 30 minutes for the combined shuttle and guided walk.
Accessibility
The exhibition building and its facilities are fully wheelchair-accessible. The monument grounds feature gravel and uneven terrain, meaning access to the summit platform and lower pathways may be restricted for some mobility aids. Contact brunaboinne@opw.ie when booking to arrange specific assistance or discuss alternative viewing options.
Contact & additional details
- Phone: +353 41 988 0300
- Email: brunaboinne@opw.ie
- Official website: https://heritageireland.ie/visit/places-to-visit/bru-na-boinne-visitor-centre-newgrange-and-knowth/
Nearby Attractions
The Boyne Valley packs a high concentration of historic sites within a short drive. Pair your visit to Knowth with a trip to the Hill of Tara (approximately 17 km away), Ireland’s legendary seat of the High Kings. The nearby Dowth passage tomb offers a different perspective on Neolithic engineering, while the medieval ruins of Mellifont Abbey and the walled town of Drogheda provide strong contrasts between ancient and medieval Ireland. All of these locations are easily combined into a single-day itinerary based at the Visitor Centre.