Carnasserie Castle

You'll spot Carnasserie Castle long before you reach it - that distinctive ruined tower rising above the moorland between Lochgilphead and Tayvallich commands attention from miles around. Built in the 1560s by John Carswell, who was both a Protestant reformer and a bishop, it's one of Argyll's most atmospheric castle ruins and genuinely worth the detour.

The castle sits on open ground with properly stunning views across Loch Fyne. You can walk right up to it - it's unstaffed and free to access any time - and explore the remains of the main tower house and courtyard walls. The views from the upper levels (if you fancy the climb) are reason enough to visit. On a clear day you're looking out over the loch towards Cowal, and the light changes constantly across the water.

History buffs will appreciate the Protestant connections and the architectural details that survive - it's genuinely interesting rather than just a pile of stones. Families with older kids will manage fine; younger ones might get bored after twenty minutes unless they're into climbing about ruins. Walkers should allow an hour for a proper poke around, longer if you want to sit with a flask and take in the landscape.

If you're staying at The Pod Over By nearby, this makes a brilliant half-morning excursion before heading into Lochgilphead for lunch. The light's best in late afternoon, so plan accordingly. It's exposed and windswept - bring a jacket even in summer.