Open to visitorsa Historic Environment Scotland site — many are free to wander; staffed ones charge and keep set hours
Standing remainssubstantial fabric survives to stand in front of
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Knowe of Onston is a chambered tomb in Orkney Islands. The Albion Guide lists 38 chambered tombs in the county; this is one of them. It is looked after by Historic Environment Scotland. The surrounding countryside is part of Hoy and West Mainland National Scenic Area.
Cummi Howe and Ring of Brodgar are among the ancient sites within 2.1 km.