Which of these is a district in Schleswig-Holstein?

1. Ammerland
2. Mecklenburgische Seenplatte
3. Nordfriesland ✓
4. Rhein-Sieg-Kreis

Nordfriesland is a beautiful district in the far northwest of the state. It is famous for the Wadden Sea, a unique UNESCO World Heritage site that you should definitely visit!