Berlin is the capital of Germany located in Europe. The official language is German and the currency is the Euro. Berlin has a continental climate with warm summers and very cold winters. Air travel is a common way to travel long distances. Berlin was formed by the union of two cities and has a history of being divided by The Berlin Wall which was constructed by East Germany to prevent migration to West Germany and was torn down in 1989. Major attractions include museums on Museum Island which has several famous museums and is a UNESCO World Heritage Site.