Cardiff Castle’s coolest surprise is hidden inside its walls
At Cardiff Castle in central Cardiff, tunnels sheltered almost 2,000 people during the Second World War (1939–45).
I climb the Norman Keep first, chasing the huge city view in blazing sunshine. Then I step inside the old walls and the temperature drops. The long, dim shelter still has benches and wartime sounds; once, it also held bunks, kitchens, toilets and first-aid posts.
That sudden coolness makes the past feel startlingly physical. These walls protected ordinary Cardiff workers and families, not just medieval lords.
The £16.50 ticket feels wonderfully well spent. I’d warmly recommend giving yourself time to wander.