I was just watching a show on The History Channel, Modern Marvels, and the had a segment about a battleship or aircraft carrier the British were designed that was made completely of ice, actually ice with sawdust in it so it wouldn't break Anyone know more about this? I just caught the tail end of the segment so I don't know how in-depth they went. One thought did occur, this concept would lead to some interesting looking models.....
I found a website that shows this in more detail:
http://www.combinedops.com/Pykrete.htm