Arrochymore, dun site

You'll find Arrochymore dun site sitting quietly in Argyll, about an hour north of Glasgow if you're willing to venture off the main routes. It's an Iron Age fort - essentially the crumbling remains of what was once a properly defensible stronghold, though you need to know what you're looking for to appreciate what's left.

What you're actually seeing is the stone footprint of an ancient dun, those circular or oval hill forts that dot the Scottish Highlands. The site itself won't overwhelm you - it's modest, atmospheric, the sort of place where you stand around trying to imagine Iron Age life rather than marvelling at intact stonework. That said, if you're already exploring the Loch Lomond area, it's worth the short diversion. History types will get more from it than casual visitors, and if you've got kids in tow, prepare them beforehand or they'll lose interest fast.

Access appears to be free and unrestricted, though there's no visitor infrastructure - no signs, no facilities, no opening hours to speak of. Bring proper footwear and a decent map. The nearby camping at Milarrochy Bay is practically on your doorstep, making this easy to slot into a longer Loch Lomond holiday. The glamping pods scattered around - Arcadia, Sunset, Duncan Family Farms - are all within easy reach if you want something more comfortable as your base.

Give yourself an hour here, maybe ninety minutes if you're the contemplative type. Best visit on a clear day so you can actually see what you're looking at.