A popular excursion for Elbe River cruises is the metropolitan capital city of Berlin with its 3.5 million residents from more than 190 different countries. Berlin is best known for its historical importance, being the German capital, internationalism and tolerance, lively nightlife, its many cafés, clubs, bars, street art, and numerous museums, palaces, and other sites of historic interest. Berlin’s architecture is quite varied. Although badly damaged in the final years of World War II and broken apart during the Cold War, Berlin has experienced a remarkable reconstruction especially with the reunification push after the fall of the Berlin Wall in 1989. It is now possible to see representatives of many different historic periods in a small area within the city center, from a few surviving medieval buildings near Alexanderplatz, to the ultra-modern glass and steel structures at Potsdamer Platz.