Geometric Stone Spheres of Scotland: Part 1 – More Than A Projectile - What Possible Purpose 5,000-years Ago?
Four hundred and twenty geometric stone spheres have been found in the vicinity of Neolithic stone circles in Northern Scotland, with 169 coming from Aberdeenshire alone. Outside Scotland, examples have been found in Ireland at Ballymena, and in England at Durham, Cumbria, Lowick and Bridlington.
Source: ancient-origins.net