1. Potsdamer Platz is a public square in the central part of Berlin that has been rebuilt from the ruins of the Wall. It offers a unique mix of old and new architecture, with modern buildings and historic landmarks surrounding the plaza. One of the notable features is the Sony Center, a spectacular glass building that houses a cinema, restaurants, and a giant screen. The square also has a large shopping area with over 120 stores, cafes, and restaurants, as well as a vibrant nightlife scene.

2. Potsdamer Platz is open 24/7, but the shops and restaurants have their own working hours. The phone number of the visitor center is +49 30 25 00 23 33.

3. Potsdamer Platz is easily accessible by public transportation, with several tram, bus, and subway lines stopping at or near the square. The closest subway station is Potsdamer Platz (U2), which is just a few minutes’ walk from the plaza. The exact ticket information depends on your starting point and the mode of transportation you use, but you can find all the relevant information on the website of the Berlin public transportation system (BVG).