Berlin doesn't have just one "main street," but in 2026, the most iconic and significant boulevard is Unter den Linden. This historic "avenue of the linden trees" runs from the Brandenburg Gate to the Humboldt Forum and is the cultural heart of the city. However, if you are looking for the "main" shopping street, that would be Friedrichstraße (which intersects Unter den Linden) or the famous Kurfürstendamm (often called "Ku'damm") in the western part of the city, known for its luxury boutiques and department stores like KaDeWe. For 2026 visitors, Unter den Linden is a must-walk, as it connects the most famous landmarks, while Friedrichstraße is the place to be for high-end fashion and business. Think of Unter den Linden as the "ceremonial" main street and Ku'damm as the "commercial" main street.