We live off grid in a forest, now we have solar power, but for over 20 years we lived with no electricity. I built a coolgardie safe to keep our foods cool.
A coolgardie safe is basically a box with open sides, back & front with a door. The front back & sides are covered in hessian made from old feed sacks. On top of this box is a tray of water. The hessian overlaps into this water tray & the water soaks down through the hessian sides & keeps the inside cool.
A spring house is a building built over or below a spring so that the water flows though this building & keeps the inside cool.