The location is from episode 334 of season 3, a scene with Jeroen and Patricia where they discuss Rufus's plan.
A building can be seen in the background, which turns out to be a farmhouse.
This scene was filmed at Koningin Astridlaan 11, near the Dertien Eikenhoeve in Bonheiden, Belgium.
Apparently, they also filmed at the side or back of the farmhouse.
Unfortunately, the farmhouse has been demolished since 2010.
This was also quite a difficult location to find.
I suspected they had filmed further down the road, and that was indeed the case.
