The Frozen Danube

We're not having much of a winter in Maryland, but in Europe, the Danube River is frozen, there was ice on the canals of Venice, and children in places like London and Paris are experiencing the joys of sledding and snowman building. In the 20th century the Danube has been open all winter more often than not, but it also froze in 2006, so this isn't all that rare an event.