On February 6, 1933, a temperature of −90 degrees F was recorded in Oymyakon, the coldest place in the northern hemisphere and the coldest permanently inhabited place on Earth.
Home to a few hundred people, Oymyakon's single schools closes only when the temperature drops to 61 degrees F below zero. The city of Yakutsk, population 210,000 is a three day-drive away, and is the world's coldest city. There, according to the BBC, residents leave their cars running all day. Visitors are advised not to wear glasses outside, as they may become difficult to subsequently remove.
[Editor's note: An earlier version mixed up facts between Oymyakon and Yakutsk.]