During the reign of the Frisian kings about a thousand mounds formed rings along the marsh banks of the Frisian Wadden coast. The dikes transformed the landscape and many of the mounds were flattened. But the history of their origins is still intact, albeit just a few remains of church towers. The next mound is never more than an hour's walks away. You'll often find a tiny church at the top of the mound that has been there since medieval times. Devout, strong and without embellishment. A little bit like the inhabitants.