Two university men flying near Beaumaris (Island of Anglesey, Wales) spotted what they believe to be an ancient burial site. David Roberts and John Rowlands, who work in the ocean sciences department at the University of Wales, Bangor, were photographing fish traps from an aircraft when they noticed the distinct landmark feature. "The sun was low in the sky, so it revealed this structure in the ground," said Mr Rowlands.
     Dr Raimund Karl, a lecturer in heritage and archaeology at the university, thinks the landmark may have prehistoric origins. He said: "From what can be seen on the aerial photograph, I would assume that the site is either a henge enclosure, like the one over which the late Neolithic burial chamber at Bryn Celli Ddu was built, or perhaps the remains of a relatively large Bronze Age ring cairn. There are several other possibilities of what it could have been, but they seem considerably less likely."
     But David Longley, director of the Gwynedd Archaeological Trust, suggests that the landmark may be much more recent. He said: "In the photograph, you can also see the remains of linear field boundaries from the eighteenth century.  The circular feature seems to be on top of these boundaries, which suggests it originated in the last 200 years."  He added: "We donīt yet know for definite, but it may be something from wartime. The Royal Commission on ancient and historical monuments in Wales is looking into it further."

Source: North Wales Chronicle (17 December 2004)