Often overlooked by English-speaking tourists, Muenster is a small university city near the Dutch border. The Altstadt (old town) was rebuilt after WWII to resemble its mediaeval predecessor, and you'll find most museums and historic attractions are here. For trendy clubs and restaurants, head over to the Hafen ("harbour") district.

The capital of North Rhine-Westphalia, Dusseldorf is a regional economic powerhouse straddling the banks of the Rhine River. Altstadt is not just Dusseldorf's lovely old town, but also where the city's nightlife is based and where Altbier, its native dark beer, is plentiful. Dusselforfians take their beer seriously. Königsallee (Ko to the locals), Dusseldorf's famous shopping street, has many high-end stores. And the Museum Kunst Palast has one of the Rhineland's best art collections.

A late creation by area standards, Bergisch Gladbach was founded in 1856 as a city district comprising several smaller (and older) towns, with a total population of about 105,000. The 10th-century St. Johann Baptist Church at Refrath is Bergisch Gladbach's oldest building. The Bensberg Rathaus (or town hall, nicknamed "Affenfelsen," or Monkey Rock) is a nationally known tourist attraction. Schloss Bensberg and Schloss Lerbach, both former castles, are now among Germany's top luxury hotels.

There are 2,000 years of history in Cologne, and visitors here will find everything from Roman towers to Gothic churches to fine examples of modern architecture. Cologne has a variety of museums, too—check out the Museum of Applied Art, the Museum Ludwig and, if you have a sweet tooth, the Chocolate Museum. Be forewarned, though—the gift shop at the latter will utterly ruin your diet.