Few people realise that within the walls of the Castle are tunnels – tunnels which came into their own as air-raid shelters during the Second World War.

More than 1800 people were estimated to have taken shelter within the walls and when the sirens sounded, people who lived and worked in the city would rush to the shelters. Special ramps were built so that people could gain access into the walls quickly. Research has revealed there were dormitories with bunks, kitchens, toilets and first aid posts concealed within the walls.

Now, you can see what the air-raid shelters looked like, hear the sounds from a bygone age.

The little ones could follow the Family Trail around the grounds and meet some of the characters that have made Cardiff Castle their home over the centuries.

Find the answers to the questions all around the Castle with a little help from Gwen the Celtic Girl, Marcius the Roman Soldier and many more.