[1] The broch was first recorded by archaeologists in 1912 by RCAHMS in their 'Fourth Report and Inventory of Monuments and Constructions in Galloway'.

[1] Doon Castle broch is located on the south side of Ardwell Point, which projects out into the North Channel.

Between Doon Castle broch and the northern end of the point there are further archaeological remains, including a wall approximately 2.6 meters thick.

This outer structure was likely entered in the north-northeast wall, which is situated opposite the manmade causeway.

[3] Doon Castle Broch has not been excavated, with survey only revealing rubble in the interior.