There is a total of 22 locations inside of Berlin across seven different levels. To find a location, you need to walk into the room or area and it will be shown on the map, along with a popup of the location’s name. When looking for undiscovered areas, your map can be a helpful tool because it points them out. To access your map, click Touchpad and scroll to the Map tab. Here, you can cycle through levels of the map and see where you’re missing some areas, shown in the icon below.