The transparent dome of the German Parliament (Bundestag) at night
After dark the glass dome of the Bundestag with his transparency, becomes a privileged point of view to admire Berlin at night, and to be admired from outside. It's possible to visit the dome for free (booking online needed) and it's worth to go for a break from the active life of Berlin. It was restored by the architect Norman Foster, it features a spiral staircase leading to the top of the dome.