3. Minsk (Belarus) -40C
Renowned for friendly locals, clean streets and leafy parks, Minsk benefits from a lack of tourists clogging the streets, yet there is plenty on offer for cultured visitors. The Minsk Circus is well worth a visit and is especially good for children. Adults can catch an opera or ballet, a ticket for which will cost far less than in most other cities in Europe. And the Belarusians like to boogie, so be sure to visit a nightclub or two and bring your dancing shoes.