A ship moves down the ice choked Danube River in Budapest, Hungary, on Feb. 9, 2012.
Ice floes on the Danube in Budapest, as seen on Feb. 11, 2012.
Two ships on the banks of the Danube River in Novi Sad, Serbia, on Feb. 11.
The frozen Danube River on Feb. 11, 2012.
A wide shot of the frozen river on Feb. 12, 2012.
Ice covers the Danube River in Vienna, Austria, on Feb. 12, 2012, after days and days of freezing temperatures.