Why make walls thicker when you can make them curvy?
Check out the site below: "Wiggly walls, also known as “crinkle crankle” walls, is a type of garden wall that is build in a unique snake-like shape. They are quite popular in the UK and often leave visitors wondering why on earth were the walls built in such a distinctive shape. Well, apart from looking rather funky, there’s actually a rather simple explanation – it takes less bricks to make a wavy wall instead of a straight one. If you’re wondering why, that’s because a “crinkle crankle” wall can be built one brick wide without toppling over like a straight wall would."