Chill out in Levi, Finland.
James Asquith, who holds the world record for being the youngest person to visit every country in the world, picked this as one of his hotspots.
"Located over 100 miles north of the Arctic circle, it gets seriously cold here," he said. "I was there when the Mercury dropped to -34 degrees centigrade, but once you acclimatise to having your breath taken away every morning, you can get busy with some truly unique activities. Ride snowmobiles and skid around on ice in go-karts, and be sure to check out the Ice Hotel."