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This is maybe the oldest house on St Kilda dating from the Iron Age. It's sometimes called the Earth House but the St Kildans called it Tighe an t'sithiche, meaning the House of Fairies - Outer Hebrides

The oldest crannogs in Scotland are approx 5,000 yrs. People modified, built and re-cycled them up until the 17th century in Scotland. Crannogs were used as homesteads for farmers, status symbols, places for refuge in troubled times, fishing and hunting stations and as residences during holidays. The pre-historic loch-dwellings in Highland Perthshire were at first roundhouses built with timber and supported on stilts or piles which were driven into the lake’s bed

Knowth is a Neolithic tomb dating back 5000 years and is part of the Brú na Bóinne complex in the Boyne Valley, Co Meath, Ireland