we're twinned with Neuilly in France (since 1955), Goslar in Germany (since 1969) and Kortrijk in Belgium (since 1981). Nearby Maidenhead is also twinned with Frascati in Italy. It's been great for me over the years because, as a solo singer, I was always getting asked to go to these places with choirs and orchestras for cultural exchange tours and stuff.
My home town Leighton Buzzard is twinned with Coulommiers in France and as my dad was in the local band (brass) and for a time the MD of the Leighton Operatic Society (wouldn't think that would you Suzzo :p ) there were many exchanges which mainly involved 50-odd men blowing their horns then going to get p***ed on cheap French lager.
It was absolutely brilliant, we stayed in some great holiday villages and those Frenchies can make a civic reception last for a week. Coulomiers is most famous for its cheese, sneakily called Coulommiers, very similar to Camembert. We spent a week meeting big cheeses and eating big cheeses.
Leighton Buzzard is not famous for it's cheese. It is famous for being vaguely near where the Great Train Robbery happened, and Kajagoogoo.