With North America's mild winter, you may be craving a snowy Valentine's Day getaway. Some people are content to just snuggle together inside of a regular hotel, watching the snow come down outside, but for those who can't get cozy enough, here are a few hotels from around the world where, for a few months out of the year, you can sleep inside walls of ice--literally. Modeled after the igloos of Greenland and Canada's Central Arctic, these hotels offer all of the charm of an igloo, without any of the hassle of building your own.