Demolition
The Red Army reached the nearby border of East Prussia in October 1944. Hitler departed on 20 November and two days later the order was given to destroy the complex. The actual demolition did not take place until the night of 24–25 January 1945. Many tons of explosives were required to do the job; one bunker required an estimated 8 tons of TNT. The Red Army took the site without a shot two days later, on 27 January, the same day Auschwitz was liberated further south. It took until 1955 to clear over 54,000 landmines which surrounded the installation.
Read more about this topic: Wolf's Lair