The tripto catalogue lists 17 places on the North Sea and Baltic coasts – islands, cliffs, seaside resorts and beaches. Almost all are family-friendly, and the islands themselves charge no entry.
Heligoland is Germany's only offshore island, with red cliffs, the 47-metre Lange Anna sea stack, gannets on the bird cliff and grey seals on the Düne. Amrum, with the Kniepsand, has one of the widest beaches on the North Sea and is about two hours by ferry from Dagebüll. Föhr is the largest German island reachable only by boat or plane, with the Frisian Cathedral and thatched villages. On the Baltic, Hiddensee is car-free, with the Dornbusch lighthouse and four villages. Cape Arkona at the northern tip of Rügen has two lighthouses, a Slavic hillfort and the fishing village of Vitt, and Binz, with 5 km of sandy beach and white resort architecture, is Rügen's largest seaside resort.
The catalogue's places are in Schleswig-Holstein (seven, mainly North Sea islands) and Mecklenburg-Western Pomerania (six, mainly Rügen and Hiddensee), plus Övelgönne in Hamburg.
In practice: plan a full day for an island, ideally several. Costs come from the ferry – for example Dagebüll–Amrum €22.80 return – and the spa tax, usually €2.50–3.75 a day; children and teenagers under 18 are often exempt. The swimming season is June to August, while spring and autumn are good for walks and birdwatching.