This is a "Mushroom" you can find in nature here to lead you the way. The signpost with the striking design was created by accident. When tourists during the First World War couldn't cross the border anymore, domestic tourism increased rapidly. The "General Dutch Cycling Federation" placed more signs but by the blockade of the Dutch ports, iron was not available.
So they were looking for other options and decided to place concrete poles in the shape of a mushroom. In the summer of 1919 the first twelve samples were placed in nature at the Gooi in Bussum.
Linking to "Signs, signs"