When you approach Groningen city from the south on highway A28 you see this free-standing 43 meter high electricity pylon with 7 (metal) flames. The object is called 'S01 Gate Tower Clio' and was put here in 1990 when the city of Groningen celebrated its 950th anniversary. The flames stand for the days of the week, and (a bit hard to see on this photo) the numbers 1040 on the front refer to the year 1040 when the city was officially mentioned for the first time.
The pylon is one of ten sculptures belonging to the 'Marking the city boundaries'-project. The pylon links to the natural gas fields near the city, and the name 'Clio' is the muse of history in Greek mythology.
This photo was taken from the backside from a walking trail, on the other side of the trees is highway A28.
If you would like to read more about the project (in Dutch) click HERE.