Do not be alarmed, but the building you are standing in front of was used years ago as public toilets (notice the metal sign that says "Men" still exists there). Today, you can see this place bustling to life in the hyper-atmosphere of the Kreuzberg neighborhood.
You can order your hamburger with any toppings you want - cheese, bacon, barbecue, or tofu. Be cautious, this is an excellent hamburger with equally tasty fries.
Feel free to order a hamburger and sit on one of the wooden benches. Look at the walls of the surrounding houses, which are displayed in a spectacular exhibition of graffiti and street art of the Kreuzberg neighborhood.