In this Thursday, Nov. 1, 2012 photo, a general view of central Berlin's districts Mitte and Prenzlauer Berg. Buying a home in Berlin is widely viewed as one of the safest investments a German, or any European, can make. That is why some real-estate experts are worried the market could get overheated. Home prices in Germany's largest cities are booming. Building permits and home ownership rates are climbing fast. And the percentage of foreigners snapping up second homes in Germany is on the rise. (AP Photo/Markus Schreiber)
