click here for overview

 

Basel Bergen

Bern / Biel Bienne

Brasov Kronstadt

Bratislava / Brno

Budapest

Bukarest Bucharest

Innsbruck / Kosice

Linz / Luzern Lucerne 

Mailand Milan 

Neuchatel  

Ostrau Ostrava 

Solingen

Szeged / Tallinn

Tyumen Tjumen

Winterthur / Zurich