Hands up how many of you know what a
'crinkle-crankle wall' is?
It is in fact a wall with curving lines following a serpentine path rather than a straight line.
This layout not only gives the construction added strength but also does away with the need for buttressing.
In some areas this type of wall was
used to grow fruit on as the wall would trap the rays of
the sun, which would assist the fruit in growing.