This site covers almost 10,000 square kilometers, and stretches for 400km along the north coast of Europe from the Netherlands to the Danish border. To get an appreciation of this site I visited it at several diverse locations in the Netherlands and Germany:

Texel Island - reached by ferry from Den Helder, then by bus to Oudeschild, a small port facing the Wadden Sea. From here there are excursions by boat to see the wildlife on the sandbanks.

Terschelling Island - reached by ferry from Harlingen. From the port on the island I walked to Green Beach to see the bird life there, but saw more from the deck of the slow ferry on the way back to Harlingen.

Norddeich - from here there are ferries to Norderney and Juist Islands. I took an informative cruise to the National Park to see the seals and birds on the sandbanks adjacent both islands.

Wilhelmshaven - saw views over Jade Harbour from the Wattenmeerhaus, a museum of the fauna and flora of the Wadden Sea at South Beach.

Cuxhaven - I just timed it correctly to catch low tide at Dunen Beach in order to take a trip by horse and cart out onto the sandbanks. I also visited the National Park exhibition at Sahlenburg Beach.

Sylt Island - This island is accessible only by train or boat. I took the train to Westerland, then a bus to Hornum on the southern tip of the island. Then I took a boat cruise via the Halligen to Husum, back on the mainland.