This is an ice house at St Colme House. It is on the north side of a small hill and so in the shade. Filled with ice in the winter it would keep food chilled into the summer months and provide ice for the big house.
How the other half lived – or maybe how the other 1% lived. Bear in mind a mile away men, women and children were hewing coal out of holes in the ground to allow people to afford this luxury.