Original: Mecklenburg-Strelitz was a duchy and later grand duchy in northern Germany, roughly consisting of the present day district of Mecklenburg-Strelitz (the historical Stargarder Land), bordering areas of modern-day Brandenburg with the town of Fürstenberg and the area around Ratzeburg in modern Schleswig-Holstein.
Simplified: The duchy also had three exclaves near the town of Fürstenberg and the area around Ratzeburg in modern Schleswig-Holstein.