Are you having trouble in the side missing: “Finding Nora” ? Specifically where is the wife of Mr. Freeze is hidden in Batman Arkham City? It took me awhile to search around and find it too so I figured I’d put up a quick video showing fellow gamer vets where she’s hidden. The map only gives you an approximate location and you have to travel around to locate the actual entrance which is by the water side.
Once you beat Mr. Freeze, he gives you the Freeze Blast which is needed in order to get to the entrance. You also have to beat several thugs with shields and knives on route to it.
Check out the video below. Hope it helps!