This was new to me, never heard of these before. The spiral drawing seems to be a theme all over the world, makes you wonder if there is a universal meaning. I was thinking these should be preserved but probably too hard if they are part of the rock sea wall.
I thought the exact same thing when reading the article. It is prevalent all over when supposedly nobody had contact with anyone on the other side of the flat world lol
I thought the exact same thing when reading the article. It is prevalent all over when supposedly nobody had contact with anyone on the other side of the flat world lol