In a field in Raheen Old, County Kildare, there is a prehistoric burial mound that most people will never see from the ground. The barrow, a roughly circular earthen monument of around eleven metres in diameter, does not announce itself with visible earthworks or a standing stone. What gives it away is the grass above it, which grows differently from the surrounding field, leaving a faint circular shadow that only becomes legible from above.

This kind of ghost in the landscape is known as a cropmark. Where buried features such as ditches, banks, or pits lie beneath cultivated or grassed ground, the overlying vegetation responds to differences in soil moisture and nutrient levels, sometimes producing distinct tonal variations that are invisible at eye level but readable from altitude. Aerial photography, including satellite imagery, has transformed the discovery of such sites across Ireland, revealing entire complexes of monuments that had gone unrecorded for centuries. This particular site came to light through Google Earth imagery captured on 28 June 2018, with the find compiled by Caimin O'Brien from details provided by Edward O'Riordan. Circular barrows of this kind are generally associated with Bronze Age burial practice, though without excavation the date and nature of any deposit beneath Raheen Old must remain open.