Olderfleet Castle

The moment you spot Olderfleet Castle from the Larne shoreline, you'll understand why it's commanded this stretch of coast since the 1177s. It's a proper fortress - all weathered stone and crumbling ramparts rising from the water's edge, looking like it's about to topple into the Irish Sea but somehow hasn't budged in nearly 900 years.

What you're looking at is a four-storey tower house that's seen everything: Scottish raids, English garrisons, centuries of salt spray. The castle sits right on the beach near Larne town centre, so it's accessible without a major trek, though the final approach involves picking your way across rocks and shingle. Go at low tide if you want to get close enough for proper photographs.

Historically minded visitors will have the most patience with it. There's not much interior to explore - it's largely a ruin - so you're not talking about hours of investigation. Kids might find it exciting for twenty minutes, then want to move on. The setting is genuinely atmospheric though, especially on grey days when the light catches the old walls at certain angles.

It's free to visit and accessible year-round, though winter weather can make the approach treacherous. If you're based at Down to Earth Wild Camping just a few miles away, it's a manageable morning or afternoon detour before heading to somewhere with more facilities. Pair it with a wander around Larne itself for a proper sense of the town's medieval defences.