These guys took the web interface of Google Maps and transferred it to the physical world by creating their own “A” marker.
This effect corresponds exactly to the phenomenon of Mr. Turtur, the illusionary giant of the children fantasy novel “Jim Button and Luke the Engine Driver“ written by Michael Ende.
The size of the rebuilt red Marker in reality corresponds to the size of a marker in the web interface in max zoom factor of the map.
Mmmmm…OK then.