Found something in the forest...

[Ferry_vO]

..Can you guess what it is..?

 

[Tako_Kichi]

Hmmm...launch pad for a cold-war era missile perhaps.

 

[lefty]

Is it one of those compass calibration setups ?

 

[Ferry_vO]

Is it one of those compass calibration setups ?

!

This is the compass ring as used by the Germans at Fliegerhorst Deelen. Since the current field (No longer an active field but a back-up base) is much smaller than the German field was this ring is now located in a forest just outside the fence.