Aerial backwards movement showing closeup of inner outlined space of roman regiment fortification with blueprint of the original Waterlinie defense settlement

aerial archeology cultural heritage defense structure dutch landscape educational freeway from above history landscaping monument overview regiment remains roman empire scenic tourism utrecht waterline blueprint outline observatory protection moat army forces military education travel watch tower archeological site settlement fly over tactics structure disciplined blue sky clouds inscription landmark symbolic entrance restoration preservation conservation retention waterliniepad castellum fectio fort vechten reveal backwards movement