Just Too Cool

Well, as a travel agent I've booked some cool trips, but today, I did one that will be downright COLD.  I have a couple vacationing in London in March.  So one night, they are going to fly to Sweden and stay at the ICEHOTEL.  Check it out at http://www.icehotel.com/.  Each guest gets a snowsuit, boots, hat and mittens.  And when you stay in one of the ice rooms, you have to change clothes, and use the restroom in the warm part of the hotel.  Guests are warned that anything they take into their iceroom will freeze overnight.  BUT  they do bring you hot lingonberry juice in the morning.  I've never had lingonberry juice, but I bet it's going to taste great, just because it's hot.  They'll have a "once-in-a-lifetime" experience.  Personally, I want my adventures to be above freezing.  What would you choose for your "once in a lifetime" adventure?