Germany, Berlin, Mitte, Tiergarten, interior of the glass dome on the top of the Reichstag building designed by architect Norman Foster with a double-helix spiral ramp around the mirrored cone that reflect light into the debating chamber of the Bundestag below. The top of the ramp here has the hot air vent from the debating chamber.

germany german berlin capital city europe european urban travel tourism destination tiergarten interior glass dome reichstag building architecture architect norman foster double helix spiral ramp mirrors mirrored cone reflection light debating chamber bundestag parliament politics political people visitors sightseers sightseeing tourists reunification hot air vent ventilation mitte