I was on a sunset mission on the Soester duinen in National Park Utrechtse Heuvelrug but saw those clouds and thought that doesn't going to be nice photographic weather. i started to make a time lapse of it. Here is the result
This area, which is formed by extensive sand drifts, and which also consists of heathland and forests, this area is part of the northern edge of the Utrechtse Heuvelrug.
When the population grew in the Middle Ages, the forest disappeared by the many logging companys and intensive grazing, especially by sheep. During this time extensive heathlands were created on the Utrechtse Heuvelrug in places where grazing was very intensive. After all the vegitation disapeard drifting sands formed. Nothing grew there any more and the wind created the drifting sands!