Hamburgisches Wattenmeer
Hamburg's tidal exclave at the Elbe mouth — Neuwerk's medieval tower, horse-drawn wagons across the flats, and a city-state's claim on the sea held since 1299.
The smallest of the three Wadden Sea parks is a historical oddity: a patch of tidal flats at the Elbe's mouth, a hundred kilometres downstream of Hamburg, that has belonged to the city since 1299, when the merchant republic bought its way onto the island of Neuwerk to police the pirate-ridden approaches to its river. The tower Hamburg finished there in 1310 — part fortress, part seamark, later a lighthouse — is the city-state's oldest building, and the reason a federal city today administers a national park of sandbanks and mud.
Declared in 1990, the park wraps Neuwerk with its ring dike and thirty-odd residents, the dune island of Scharhörn where a lone bird warden summers, and Nigehörn, a sand island deliberately heaped up in 1989 as compensation habitat and left to the terns. Everything between is Watt: kilometres of ribbed mud and sand that the tide uncovers twice a day, laced with tidal creeks, worked by shelduck, oystercatchers, and clouds of knots riding the East Atlantic Flyway. Since 2011 it has been part of the Wadden Sea's UNESCO World Heritage listing.
What makes this park unlike anywhere else in Germany is the commute: at low water, horse-drawn Wattwagen and files of barefoot walkers cross the open seabed from Cuxhaven's shore to Neuwerk, following pricked-out withy markers; at high water the same route is open sea, and a small ship makes the run instead.
What's worth knowing before you go
Access is from Cuxhaven in Lower Saxony — Sahlenburg and Duhnen are the wagon and walking trailheads. Never improvise the crossing: go with the wagon convoys or a certified guide, because the tide floods the route to swimming depth on a fixed schedule and fog erases every bearing. Rubber boots are for amateurs; the done thing is barefoot.
The connoisseur's version is a night on Neuwerk. When the last wagons trundle back with the ebb, the island returns to its thirty inhabitants, the lighthouse, and the birds — and you get the flats at dusk entirely to yourself.