It's been burned, bombed, rebuilt, buttressed by the Wall, wrapped in fabric and finally turned into the modern home of the German parliament by Norman Foster: the 1894 Reichstag is indeed one of Berlin's most iconic buildings. Its most distinctive feature, the glittering glass dome, is serviced by lift and affords fabulous 360-degree city views. For guaranteed access, make free reservations online, otherwise try scoring tickets at the Visitors' Service for the same or next day. Bring ID.
At the top, pick up a free auto-activated audioguide to learn about the building, landmarks and the workings of parliament while following the ramp spiralling up around the dome's mirror-clad central cone.