Dunnideer stone circle, 450m NW of Dunnideer Tower
Stone circle · Aberdeenshire
Fortress
Dunnideer Castle is a ruined tower house near Insch, Aberdeenshire, Scotland. Built around 1260, it reused stone from an earlier prehistoric vitrified hillfort dating to approximately 250 BC. The tower measured 15 by 12.5 metres (49 by 41 ft) with walls 1.9 metres (6.2 ft) thick, likely featuring a first-floor hall and multiple stories.