Easily one of the rarest medals a troop can earn is the Antarctica Service Medal. Spend a single day in Antarctica, south of 60 degrees latitude in the Southern hemisphere, and you've forever got bragging rights.
Just let that sink in a bit. Coasties can get that cooler medal far easier than a grunt. Stings doesn't it? (U.S. Coast Guard photo by Petty Officer 2nd Class Grant DeVuyst)