The Wadden Sea
The Danish Wadden Sea takes its beginning at the river valley in Varde in the north and ends at the border in the south, an area of about 100 km². Two times a day, with a 12½ hours interval, it is high tide; the lowest tide is about 6 hours after the high tide. One billion cubic meter of water pass through the channels between the Wadden Sea islands Fanø, Mandø and Rømø at every high tide and spread out over the mud flats between the islands and the main land. The water is always passing through. The tide shapes the landscape, moves great sand and clay areas and creates islands and channels in the world of the Wadden Sea.