A crinkle-crankle wall is an unusual type of garden wall found in the East Anglia region of east England, but popular mostly in the county of Suffolk.
A crinkle-crankle wall is wavy with alternating convex and concave curves like a sinusoid. While this might seem like an unnecessary wastage of bricks, it actually is not. A straight wall requires buttresses in order to make it stand, which can either be provided by a wide footing or supporting posts every few meters. But when the wall is made curvy, the sinuous shape prevents the wall from toppling over without the need for buttressing even if the wall is only one brick thin.
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A Crinkle crankle wall. Photo credit: Esther Simpson/Flickr
Source: amusingplanet.com