2026, Austria, Belgium, Germany, the Netherlands, Portugal, USA (LA + Santa Barbara + Chicago)
2025: Austria, Belgium, Germany, Greece (Thessaloniki), Italy, the Netherlands
2024: Austria, Belgium, Germany (Berlin, Bremen), the Netherlands, UK (Cambridge), Vietnam (North + middle)
2023: Austria, Belgium, Bulgaria, the Netherlands, South Korea
2022: Albania, Austria, Belgium, Colombia (Middle + East), Denmark (Copenhagen), France (Paris), the Netherlands, Peru (Machu Picchu), USA (San Francisco)
2020: Austria, Belgium, the Netherlands
2019: Austria, Belgium, Germany (Göttingen), Indonesia (Bali), the Netherlands, UK (Cambridge, Isle of Skye)
2018: Austria, Belgium, Denmark, the Netherlands, Russia (St. Petersburg), Sweden, UK (London)
2017: Austria, Belgium, Estonia, Germany, Latvia, Russia (Siberia + Moscow + Kazan), UK (Scotland)
2015: Austria, Belgium, Croatia, Ireland, UK (London + Newcastle)
2014: Austria, Belgium, USA