This is the top of a cube showing a historical map of the north east region of the province Groningen, now known as the Reiderwolderpolder. The blue stone cube with the porcelain enamel top, mentioning the small villages Drieborg and Nieuwe Statenzijl, can be found at a parking place along the road to Drieborg.
It was created by sculptor Juul Sadée, and is one of the objects belonging to the art project "3-BORG UNPLUGGED" from 1996.