Transport in Cologne have legal rights to dig in all future building sites within the medieval city limits before all heavy construction machinery. Currently the average cruising speed is 26.6 kilometers per hour (2006). The Rhine-Ruhr S-Bahn has 5 lines which cross Cologne.The S13/S19 runs 24/7 between Cologne Hbf and Cologne/Bonn Flaughafen. Cologne Ports (HGK) is one of the largest operators for inland ports in Germany. Ports include Deutz, Godorf, Mülheim and Niehl I and II. The name of Cologne's international Airport is Konrad-Adenauer-Flughafen. It is shared with the neighbouring city of Bonn (Cologne/Bonn Region). It's the sixth largest airport in Germany while
NS Documentation Centre of the City of Cologne the best pre-served prisons from the Nazi era, representing an historical asset of national and European importance. Since June, 1997, the permanent exhibition in the EL-DE building has depicted political, social and community life in "Cologne During the Nazi Era." That includes the seizure of power and the power apparatus, propaganda and the "national community," everyday life, youth culture, religion, racism, the genocide of Cologne's Jews and its Sinti and Roma, and opposition, resistance, war and society during war. In addition, temporary exhibitions depict local and national aspects of the Nazi regime. The center also mounts more than 130 events