From the Gaelic Dún Add, 'fort on the (River) Add', this is an Iron Age hillfort and the capital of the ancient kingdom of Dál Riata, where the earliest kings of Scotland were crowned. It's mentioned in various ancient texts as far back as 683 AD and is thought to have once been an island. It seems a bit like that even now as the surrounding land is boggy and often flooded, the River Add overflowing into the adjoining fields! It has been excavated several times and many artifacts found including flint knives and pottery from the 6th to the 8th centuries AD.
We stayed right at the foot of this rocky outcrop three weeks ago and saw it from the kitchen window of our rented cottage every day. (See my review of Dunadd Cottages) We climbed to the top of the fort the first day it wasn't raining (well, not raining much anyway!) It's quite a steep climb and a bit dangerous when the rocky 'steps' are slippery so care needs to be taken. It's well worth it for the view of the surrounding countryside.
There's a small free car park at the foot of the fort, accessed off the A816 (turn left at the sign) read more