Starting in December and to April you can travel to the Arctic Circle and spend nights in a glass igloo. From your bed you will see the best show in the world which is the Northern Lights. This year will be especially good since the sun spot activity is amazingly active. They also have an option where you can stay in an Ice Igloo.
The Hotel Kakslauttanen in Finland has regular rooms, reindeer sleigh rides and great restaurants. There is also a complete restaurant made out of ice. Click here to get more information.