Talking about winter holidays' hotels, here it is the Swedish Ice Hotel.
Every year it melts and they built it up again when the cold weather comes back. Every year many artists are called to design the different suites: unique rooms every year. The only thing that they keep the same is a big chandelier in the hall.
Please go to have a look at the website and other rooms... http://www.icehotel.com/uk/ICEHOTEL/Art-design/
I think designing one of the rooms is my new dream :)