in 1940, 13 transport planes took off from Berlin, 11 landed on the frozen lake Hartvikvatnet, and never left. The lake melted in spring, they sank, some have been salvaged, a couple are still in the lake (Thanks Asterix!)
Like I said, some are still there. The 13 planes flew to Norway in a World War II mission to transport troops out, or bring supplies in to supply Germany troops at an important shipping port, as the supplies by German ships had been stopped by the allied ships The winter mission was very risky and behind enemy lines, and did not succeed when the aircraft were damaged when landing on the frozen surface of the lake, making them unable to take-off again. When the ice melted in the spring, the aircraft sank to the lakebed, where they remained for more than 40 years. and some have been lifted out The Militärhistorisches Museum der Bundeswehr - Flugplatz Berlin Gatow has assisted in several recoveries of underwater A Ju 52/3m airplane recovered from Lake Hartvikvann near Narvik (Norway) in a joint project by Gunther Leonhardt (Aviation Museum Laatzen-Hannover), on 22 August 1986. Today, the plane is on display in the Ju 52 hangar of the Wunstorf airfield on loan from our Museum. A Focke-Wul
