Carrick Castle is a compact medieval tower house on a rocky outcrop beside Loch Goil, with a small village of the same name around it. Its tall stone walls sit close to the water, giving you a striking castle-and-loch view without a long walk. Plan this as an exterior viewing stop: the castle is privately owned, rather than a visitor attraction with rooms you can tour.
It’s a good choice if you’re already exploring Loch Goil and enjoy old buildings in their landscape. For a quick stop from the main road, the journey is the tradeoff. The final approach follows the loch to the end of the road, so you’ll return the way you came.