Caerphilly Castle — Wales' largest and Britain's second-largest medieval fortress (after Windsor), built in 1268 by the "Red" Earl Gilbert de Clare to resist the Welsh prince Llywelyn ap Gruffudd. It pioneered Britain's first "concentric + artificial lake" water defence design, with a 30-acre stronghold wrapped by two rings of moated walls — trebuchets couldn't get close, tunnels couldn't be dug. The south-east tower, blasted by Parliamentary gunpowder during the Civil War, leans at 10° — steeper than Italy's Leaning Tower of Pisa and Wales' most photographed "crooked landmark." After two years of major restoration, the medieval Great Hall reopened in 2024 with a brand-new digital interactive exhibition — a seven-century military engineering marvel, just 25 minutes by train north of Cardiff.
From the concentric water defences of the East Gatehouse to the breathtaking 10° lean of the tower, from the brand-new digital interactive Great Hall's medieval feast to trebuchet splashes across the lake — half a day to understand Britain's most underrated military engineering masterpiece
Take a 25-minute train from Cardiff Central to Caerphilly station, then a 5-minute walk to the castle entrance. Collect your guide leaflet (with simplified Chinese introduction) at the Visitor Centre, then enter through the Outer East Gatehouse — twin towers flank the passage, murder holes in the vault and two portcullises create the most terrifying medieval "funnel kill zone." Cross the water gate passage into the inner ward and the 30-acre fortress opens before you: to the left, the medieval Great Hall, freshly reopened after two years of restoration with a brand-new digital interactive exhibition projecting the clamour of a 13th-century hundred-guest banquet onto the stone walls; to the right, the famous Leaning South-East Tower, tilting at 10° — even steeper than Pisa — with the gunpowder-blasted base still clearly visible from the 1640s. Walk the battlement route for a 360° view over the artificial lake and Caerphilly's red rooftops, spotting swans and carp in the water. Then descend to the southern dam platform to examine life-size replica siege engines — trebuchet, mangonel and ballista — which fire real projectiles on special summer event days. Finish with a stroll through the Wildflower Garden, climb the water gate viewpoint for photos, and in the evening settle on the terrace of Casa Mia restaurant directly opposite the castle, raising a glass of Welsh craft ale to the leaning tower in the twilight.
Situated on the first floor of The Twyn directly opposite the castle, this is the best restaurant in Caerphilly for castle views — the terrace seats face the full 30-acre ancient fortress. A family-run Mediterranean eatery serving everything from Spanish tapas and Italian pasta to charcoal-grilled steaks, with a cocktail bar offering over twenty creative drinks. Order an Aperol Spritz in the evening and watch the leaning tower cast its stubborn shadow in the dusk — the most romantic finish to a half-day castle trip. Budget: £15-25 per person.
A TripAdvisor Certificate of Excellence café at 47 Cardiff Road, just a 3-minute walk from the castle. Freshly baked Welsh Cakes arrive warm and dusted with sugar, paired with locally roasted coffee and handmade sandwiches — the most authentic Welsh breakfast before setting off for the castle. Vegetarian, vegan and gluten-free options available. Google rating 4.5+. Budget: £8-15 per person.
A family-run deli-café at 8 St Fagans Street, a 4-minute walk from the castle. Their signature is origin Caerphilly Cheese — the mild, white Welsh classic that takes its name from this very town — served in sandwiches with homemade chutney and rustic bread, or arranged as a luxury cheese board with a glass of Welsh cider. Homemade cakes, jams and pickles line the shelves — a treasure trove for souvenir shopping. Budget: £6-12 per person.
Opened in 1957, this hillside hut is the oldest independently run snack bar still operating in Wales — and arguably the whole of the UK. After climbing Caerphilly Mountain (271 metres, a 15-minute walk), rest here with a freshly grilled burger, hot dog and chips washed down with a hot chocolate, looking down at the castle like a toy model set in the middle of town. Reasonably priced, generous portions, and dog-friendly. A 5-minute drive from the castle — the perfect refuel stop for a castle + hillwalk day trip. Budget: £5-10 per person.