Double Lottchen or double Berlin?

Due to the division of the city, there were many buildings or areas twice in the city - a unique situation worldwide. We explore double Berlin by bus or public transport. You will see the House of World Cultures and the Congress Hall, Karl-Marx-Allee and the Hansa Quarter, the Museum Island and the Cultural Forum, the State Opera and the German Opera, the Academy of Arts on Hanseatenweg and Pariser Platz, the Philharmonic Hall and the Konzerthaus on Gendarmenmarkt.