The in 1986 signed town twinning with Chinandega occupies a special place. Information about the totally different general living conditions as well as help for people in the Nicaraguan partnership are in the foreground. Today large drinking water tanks in the tropical region with the label 'Leverkusen'are testimony of the connection to this provincial capital. Despite the distance of 7.000 kilometres diverse contacts have been established.

The town twinning with Oulu high up in the north of Finland was sealed in 1968. The seaport at the Gulf of Bothnia combines urban flair with extensive parks because its total surface, five times larger than that of Leverkusen, but only have three quarters of the inhabitants. Some white wooden huts are reminders of the rustic past. They are being lovingly conserved in the international coined university town and high-tech metropolis as well as the truly Finish traditions: sauna, salmon soup and the midsummer celebration.

By coincidence the completion of this German-German town twinning with Schwedt happened in the weeks of the Fall of the Wall in 1989. Active east-west exchange started immediately. Several Leverkusen citizens accompanied the change of the former GDR model city, who tackled the social drastic change with energy and Uckermarkish humour. Today the former margrave residence did the best they could with the socialist prefabricated buildings and is now a lively industrial town on the German-Polish national park Unteres Odertal.