Reichstag dome, Berlin

Inside Sir Norman Foster's remarkable Reichstag dome in the German capital. It's one of the most dramatic sights in Berlin and it's free to visit - after online registration to book an appointment and airport-level security (but more polite) to get in. That's understandable as you can see the politicians in session in the main chamber below. Didn't spot Angela Merkel, and was not particularly disappointed by that fact.