http://en.wikipedia.org/wiki/An%C4%B1tkabir
From: http://www.quovadimus.org/turkey99/ankara/2-400.html
Inside the mausoleum itself. You can see the cenotaph in the window. The actual tomb of Mustafa Kemal is somewhere below.
The sarcophagus of Ismet Inonu, Ataturk's right-hand man.