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The National Monuments Service in Ireland is using high resolution aerial photography from Bluesky to map and investigate a giant 4,500 year old Henge. The circular structure, located the Brú na Bóinne UNESCO World Heritage Site, is evidence of prehistoric earthworks and was first observed by researchers with drones. The summer of 2018 was unusually dry with near drought conditions during June and July, conditions which had already revealed crop marks of ancient castles and Iron Age forts in England and Wales. Researcher and photographer Anthony Murphy therefore decided to fly his drone over the Boyne Valley and located a large, circular crop mark in open farmland, indicating the presence of buried archaeological features. www.bluesky-world.com
