Here are a few places that I went to, for studies, olympiads, work, business, seminars, conferences, administration, or just inspiration:

Amsterdam, Ann Arbor, Bacau, Barcelona, Bedlewo, Beijing, Belgrade, Berkeley, Besancon, Bilbao, Bordeaux, Boston, Braunschweig, Bruxelles, Bucuresti, Budapest, Buenos Aires, Busteni, Campulung, Cape Flattery, Cargese, Cergy, Cheia, Chicago, Clermont-Ferrand, Cluj, Constanta, Cordoba, Cork, Firenze, Fleurance, Fredericton, Geneve, Grenoble, Herstmonceux, Iasi, La Falda, Larnaca, Lausanne, Le Havre, Les Houches, Luxembourg, Kingston, Lake Placid, Lake Tahoe, Leuven, Lille, London, Los Angeles, Lyon, Madison, Madrid, Malibu, Mangalia, Marseille, Montpellier, Montreal, Morelia, Munchen, Nashville, New York, Niagara Falls, Nice, Oberwolfach, Omaha Beach, Orleans, Oslo, Ottawa, Palm Springs, Paris, Pau, Pisa, Predeal, Ramnicu-Valcea, Rennes, Reno, Roma, Saarbrucken, Santa Barbara, Seattle, Sienna, Sigtuna, Sinaia, Sofia, Split, Spokane, Strasbourg, Toronto, Toulouse, Trieste, Venice Beach, Victoria, Warszawa, Washington, Waterloo, Wien, Yellowstone, Yosemite

All this was nice, but quite tiring, and I’m not travelling much any longer. You can reach me via email, I answer within 24hrs.