Castle Stalker

The moment you round the bend near Oban and spot Castle Stalker rising from its island in Loch Laich, you understand why this place lodged itself in people's minds for centuries. It's a proper four-storey keep, built in the 1440s, and it sits just offshore like someone planted a chess piece in the water. Access depends on the tides and the owner's whim - you'll need to check ahead, ring them, get the details sorted before you drive out. Some days you can reach it on foot across the causeway; other times a boat's your only option.

Walkers and history types will find this rewarding in a way that Instagram tourists might not. There's no gift shop, no staged experience. You're looking at raw medieval stone, climbing narrow spiral stairs, standing in rooms where actual people lived. Families with younger kids might find the access faff frustrating - it's not the sort of thing you can casually pop into between other attractions.

Based just outside Oban, it slots neatly into a wider trawl round Argyll if you're staying at Seaview, Tralee Bay, or any of the caravan parks scattered within five miles. Allow a full morning or afternoon rather than treating it as a quick stop. The journey out, the wait for tides, the climb through the castle itself - it demands time. Properly done, it's the kind of excursion that sticks with you long after the holiday ends.