These are getting spaced further out; I apologize. These are places I haven't been, and I find it difficult to muster enthusiasm.
Hamburg is the second-largest city in Germany and the eighth-largest in Europe. It's situated in the middle of the border between Niedersachsen and SH, and close to Mecklenburg-Vorpommern, on the Elbe River. It has your usual complement of continental architecture, as well as cultural opportunities like opera. It was once a member of the Hanseatic League, as was Bremen, and it's still a major shipping port in Europe.
Schleswig-Holstein is the northernmost province of Germany. It's the lower half of the Jutland peninsula, south of Denmark. Shipping is a major part of this area's economy.
Kiel is the capital of the state. It's the site of an annual regatta at the end of June.
Flensburg has the distinction of being the northernmost German city, at the Danish border.
Lübeck is Germany's largest Baltic port. It's practically on the border with Mecklenburg-Vorpommern. It's also home of the marzipan industry.
Up next: a trip eastward to Mecklenburg-Vorpommern and the Baltic coast.