At the end of World War II, the Nazis used military trucks for months and months to dump in crate after crate of stolen art, money and treasure into Austria’s Lake Toplitz. “The Nazis eventually commissioned locals to do the deed, bringing the crates by oxcart, transports which occurred more and more frequently in the frantic last days of the war.” While some of the treasure was recovered after the war, much is still there, and authorities are now worried that repeated search missions are harming the lake.