Have a good walk round the castle and the defences can be seen, ramparts north, west and south. Nature has taken care of the eastern defences which are a severe drop into the River Fiddich. (hence the whisky) The farm near the castle is called, apt for me, Parkhead! Another fort at Conval can be seen to the west.
Park on the A941 and follow the track east. If taking a car, the track wouldn't be advisable.
A bivallate Iron Age hill fort or a least that is what most authorities consider it to be, (there is some discussion as to whether it may be medieval). What is certain, is a 15th century L-plan tower house stuck in the middle of the fort which in my humble opinion doesn't detract too much from the feel of the place, in fact it gives an air of continuity to the site. It is a bit of a lonely spot, and judging by the delight of the local sheep to see visitors, doesn't receive much attention, a shame because it is no great hike from the main road.