Aerial view of the Ringvaart along Haarlem Schalkwijk. In the middle at the top of the Kunstfort at Vijfhuizen. This aerial photo is classified as a NATO-Secret Stock Photo - Alamy
Aerial photo from the bottom left to the top right walking the Ringvaart of the Haarlemmermeer with vertically upwardly the Spaarne. The buildings on the left belongs to Heemstede. At the bridge