Ancient Monuments

History on the Ground

This site is entirely user-supported. See how you can help.

Cors-y-Bol Round Barrow

A Scheduled Monument in Tref Alaw, Isle of Anglesey (Ynys Môn)

We don't have any photos of this monument yet. Why don't you be the first to send us one?

Upload Photo »

Approximate Location Map
Large Map »

If Google Street View is available, the image is from the best available vantage point looking, if possible, towards the location of the monument. Where it is not available, the satellite view is shown instead.


Latitude: 53.331 / 53°19'51"N

Longitude: -4.4414 / 4°26'29"W

OS Eastings: 237516

OS Northings: 384349

OS Grid: SH375843

Mapcode National: GBR HMDW.Y0L

Mapcode Global: WH42C.RJ7Q

Entry Name: Cors-y-Bol Round Barrow

Scheduled Date: 2 July 1957

Source: Cadw

Source ID: 2536

Cadw Legacy ID: AN091

Schedule Class: Religious, Ritual and Funerary

Category: Round barrow

Period: Prehistoric

County: Isle of Anglesey (Ynys Môn)

Community: Tref Alaw

Traditional County: Anglesey


The monument comprises the remains of a barrow, probably dating to the Bronze Age (c.2300 BC - 800 BC). It was discovered in April 1956 by the farmer while reclaiming land on the edge of the bog. It consists of a circular earth bank 24.5m in diameter and 60cm high by 2.4m broad. There are some large stones set in the bank; one was removed during the ploughing and three others are visible. They seem to be c.2m apart. SE of the centre there appears to be a slight raised area about 6m in diameter.

The E part has been ploughed and the clay soil of the bank showed up against the peat at the time, while that to the W lies on boggy ground. Flints have been found in the field to the E of the circle.

The monument is of national importance for its potential to enhance our knowledge of prehistoric ritual and funerary practices. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structures themselves may be expected to contain archaeological information concerning chronology and building techniques.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

Other nearby scheduled monuments is an independent online resource and is not associated with any government department. All government data published here is used under licence. Please do not contact for any queries related to any individual ancient or schedued monument, planning permission related to scheduled monuments or the scheduling process itself. is a Good Stuff website.