Where is Hitler's grave?

Adolf Hitler committed suicide with his wife on April 30th 1945 in his Berlin bunker. His remains were discovered by the Russians and buried in a secret location in Magdeburg. They were later dug up again and burned. The ashes were scattered. So the answer is: he is not buried.

The place is unknown. His corpse was disposed of by the Soviet Army. The Allies were keen not to provide any 'place of pilgrimage.'