maybe modern AC... (Score 1)

but there is a castle in mexico that is over 1000 years old on a mountain by the sea. The designers built tunnels in the mountain so that the coastal winds would be pushed through the mountain into the castle. The cold rock in the mountain cools the air before it is propelled into the castle. It was over 100 outside, and a cool 78 (according to my watch thermistor) inside. Quite the marvel.