A man and his child walk through the 20-foot high Ice Castle at the Mall of America in Bloomington, Minn. on Monday, Dec. 31, 2012. The Ice Castle is made of icicles organically grown from four million gallons of water and then fused together. Owner and builder Brent Christensen said the late start to winter hindered the progress of the yet-to-be completed structure, but said he's confident it'll become the biggest ice castle he's completed to date and is excited by Twin Citians' response, since they "have a lot of enthusiasm for winter and ice." (AP Photo/Pioneer Press, Chris Polydoroff)