Wander up to Luleå in Sweden if you can some day! Don't go through Heathrow, legitimately the worst building I've ever been in, Take Icelandair through... Iceland. There is an ice road here you can walk, skate, and even drive on. Gets to -30c, though I've heard some years get as low as -40. They put a sauna out on the ice and cut a hole next to it so you can go right from the sauna to the water