User blog comment:Jimeee/Skyrim 1.9 beta update adds Legendary difficulty and raises level cap (Updated Apr 8th)/@comment-98.193.152.141-20130412232453/@comment-174.24.32.45-20130502051752

I have X box and I have had this issue sometimes as well. Some parts of the map doesn't load and is bugged. I found that going through a door to a building and then going back fixes this.

I had the problem when I left the Iron Maiden in Whiterun. The land around the frount gates was not there.

Also in a house in Raven Rock the ground/upper level floor was gone but rugs and the lower level was fine. Had to jump to interact with the door to get out and fix the bug.