spring houses are remarkably effective, and have been around since god knows when. my dad still has one of the ones his dad built on the farm, and grandad built his on the foundation the prior owner had put one on sometime in the 1900s, and seems that the foundation had been there before that.
dad did some digging about and has found old musket balls and whatnot around the foundation,but not as deep as the foundation bottom. dunno how fair an indicator that is of age, but the house easily dates to the french and indian war, or at least the main timbers and foundation do.
they're simple in concept but can get as fancy as you want. a trough for water to run through, shelves to keep goods in, a vent at the top to let air out, and feel free to store items in the running water, provided you keep them in large jugs or similar. the same springhouse also feeds water to the farmhouse.
i reccomend foxfire book one if you're interested in springhouses as food storage. my dad does indeed use his, mostly for lagering his homebrew and keeping finished beer cold for hot days, but they've kept butter, eggs and fruit up there when there's been too much for the fridge in the house. it's just a bit of a hike to get to. it is, however, right next to the workshop and sawmill.
dad knows what he's doing, i guess.