Berlin is served by the port of Warnemunde which is one hour away by train. Berlin's landmarks include the Brandenburg Gate which was once part of the Berlin Wall, and the avenue of Unter den Linden which formed part of old Berlin's aristocratic quarter. Potsdamer Platz is an area of theatres and restaurants popular with locals, and the Reichstag's new glass dome was designed by Sir Norman Foster. Berlin's TV Tower has a rotating Telecafe for birds-eye views of the city.