Most famous is either Salpausselkäs, or Korvatunturi. Salpausselkäs are the great eskers of Finland, and Korvatunturi is the place where Santa Claus is said to live.

Santa is not real

...anyway, the place is called Korvatunturi and you can find it with Google Earth's Fly To feature.

The Finnish people believes that Santa Claus lives in Lapland, in Finland.

Santa Claus in the Christmas Eve in the 24th of December. (And by the way, Santa Claus lives in Finland in Korvatunturi ("Ear Fell") near Rovaniemi.)

It's not in a city, of course, but it's known to be located somewhere near the city of Rovaniemi. The place itself is called "Korvatunturi" ("Ear Fell").