Bard's Leap Summit

Bard's Leap Summit is a location high in the mountains. A big waterfall is cleary visible and when jumped off you will die.

Bug/Glitch
However, if you fast travel to the location and you have a horse, it's possible the horse will spawn above the waterfall and float in the air. See video below:

http://www.youtube.com/watch?v=khrMyWS8G-Y