The Discovery Channel's Mount Everest in 3D is probably the closest that you will ever get to climbing Mount Everest.
In effect the climb is just a video of (what I assume is) a 3D map of Everest. However the video is linked to an elevation scale and as the video plays you can keep track of the rising elevation. On your ascent of the mountain you can also stop off at the Khumbu Icefall.
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