Tre'r Ceiri Hill Fort

The walk up Tre'r Ceiri Hill Fort demands proper legs and decent shoes, but the effort pays off handsomely. You're climbing to an Iron Age settlement perched at 565 metres on the Llŷn Peninsula, just inland from Pwllheli, and the views across Cardigan Bay are genuinely spectacular on a clear day.

What you actually find at the top are the remains of stone-built roundhouses - circles of rubble marking where people lived two thousand years ago. There's a sturdy stone rampart running around the hilltop, and standing inside it, you get a real sense of why they chose this spot. Defence, sure, but also command of the landscape. On a windy afternoon, with sheep grazing below and the Irish Sea glinting in the distance, it feels properly ancient.

The ascent takes about 45 minutes from the car park, and it's steep enough to make you feel you've earned the achievement. Not a stroll. Not a quick tick-box. If your family enjoys walking and can handle a rough uphill slog, they'll remember this. If they're expecting an easy meander, it'll be unpopular.

Access is free and unrestricted - it's a hillfort, not a staffed attraction. Early morning or late afternoon light does wonders for photography. The nearby campsites, including Gyrn Ddu just 2.3 miles away, make it a logical morning outing before heading to the coast. Worth the scramble.