| Year | Country | City | ||
| 2018 | Czech Republic | Prague | ||
| 2017 | Canada | Niagara Falls | ||
| 2016 | Switzerland | Zurich | ||
| 2015 | Denmark | Odense | ||
| 2014 | Ireland | Co. Kildare | ||
| 2013 | Australia | Melbourne | ||
| 2012 | Germany | Bonn | ||
| 2011 | Italy | South Tyrol, Lake Garda | ||
| 2010 | Japan | Tokyo, Kyoto | ||
| 2009 | United Kingdom | Manchester | ||
| 2008 | Canada | Vancouver | ||
| 2007 | South Africa | Cape Town | ||
| 2006 | Spain | Andalusia, Malaga, Estepona | ||
| 2005 | France | Paris | ||
| 2004 | New Zealand | Auckland | ||
| 2003 | Switzerland | Bern | ||
| 2002 | Netherlands | Amsterdam – Maastricht | ||
| 2001 | United States | New York- Washington – Baltimore | ||
| 2000 | Germany | Munich | ||
| 1999 | Ireland | Dublin | ||
| 1998 | Australia | Sydney | ||
| 1997 | United Kingdom | London-Glasgow | ||
| 1996 | South Africa | Johannesburg-Cape Town | ||
| 1995 | Canada | Toronto | ||
| 1994 | Scandinavia | Copenhagen-Oslo | ||
| 1993 | France | Paris | ||
| 1992 | Italy | Milan-Rome | ||
| 1991 | Germany | Berlin-Cologne | ||
| 1990 | United States | New York | ||
| 1989 | Switzerland | Interlaken | ||
| 1988 | Netherlands | Zeewolde | ||
| 1987 | Spain | Barcelona | ||
| 1986 | United Kingdom | Harrogate | ||
| 1985 | Italy | Como | ||
| 1984 | France | Paris | ||
| 1983 | Norway | Oslo | ||
| 1982 | Germany | Cologne | ||
| 1981 | United States | San Francisco | ||
| 1980 | Switzerland | Basel | ||
| 1979 | Finland | Helsinki | ||
| 1978 | Netherlands | The Hague | ||
| 1977 | Spain | Valencia | ||
| 1976 | United Kingdom | London | ||
| 1975 | Sweden | Göteborg | ||
| 1974 | Austria | Vienna | ||
| 1973 | Italy | Rome | ||
| 1972 | France | Paris | ||
| 1971 | Switzerland | Vitznau | ||
| 1970 | Germany | Hannover | ||
| 1969 | Netherlands | Noordwijk | ||
| 1968 | United Kingdom | Oxford | ||
| 1967 | Germany | Karlsruhe | ||
| 1966 | Denmark | Copenhagen | ||
| 1965 | Germany | Essen | ||
| 1964 | Austria | Vienna | ||
| 1963 | Germany | Hamburg | ||
| 1962 | Switzerland | Bern | ||
| 1961 | Germany | Berlin | ||
| 1960 | Germany | Düsseldorf-Saarbrücken |