Torr a'Chaisteal Dun

The walk out to Torr a'Chaisteal Dun takes you across some proper rough terrain on the Isle of Arran, and that's half the appeal. This Iron Age dun - essentially a fortified dwelling - sits on a rocky outcrop with views that justify the scramble to reach it. You're looking at circular stone foundations and walls that still stand shoulder-high in places, evidence of what must have been a fairly serious settlement about 2,000 years ago.

It's not a site that holds your hand. There's no visitor centre, no interpretation boards, no cafe. You get what archaeology actually is: a hillside, some old stones, and your own imagination filling in the blanks. That makes it brilliant for anyone who likes detective work - history types will spend a good hour photographing details and trying to piece together the layout. Families with older kids (say, nine and up) will find it exciting; younger ones might lose interest once they've clambered over the main walls.

Allow two to three hours from the nearest carpark, depending on fitness and how many photos you stop for. Free to visit, as these things tend to be. The Isle of Arran is scattered with similar sites, so if you're already here for Kings Caves Glamping - only 5.7 miles away - it's well worth adding to your itinerary. Best in dry weather; the muddy sections are properly boggy when wet. Go for the views and the sense of standing where Iron Age Arran people actually lived.